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Hi assalamualaikum warahmatullahi
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wabarakatuh Okay meet me again
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nurseffi on the channel vs mathematics
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this time we go into the compulsory Mathematics material for
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grade 12 semester 2, namely the
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counting rules in it there will be
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addition rules Multiplication rules there are
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permutations and combinations okay first
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we go to the addition rules but
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before that we first get to know the
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Hi so there are many real examples in
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everyday life related
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to counting rules for example
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on our Android there is a screen lock feature
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or screen lock that uses
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this yes even though there is a ball there is
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also a password I take a simple example,
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namely the pin pin usually consists of
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4 digits the padi will be chosen freely from the
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numbers 1 2 3 4 5 to zero yes 9
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there and zero well these 4-digits are free to take
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those numbers so there are so many
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different pin possibilities that can be
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made so the opportunity sorry so the
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number of fines that can be made is
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very much how many approximately How many
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pins can be made well That later the
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enumeration rule material will
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discuss it when we use
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these numbers you can be the team
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there are conditions for example must
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contain zero for example or can not
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have any anu and so on that we will discuss later
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Hi in this enumeration rule material Hi
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another example is the number of
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vehicle numbers or TNKB license plates Yes
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it is different or each city
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for the city of Jakarta begins with B for example
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Semarang begins with ha and so on then
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followed by four digits then
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followed by two letters or sometimes three letters
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behind the number that approximately
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how many different license plates
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can be made now if there are variations of letters
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4 numbers and there are more letters behind
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that later the material is not colonial this
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includes this there is a padlock examiner
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at that time there are those who use passwords yes
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use numbers For example like the one in
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Hi But if you enter the number
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correctly or the teacher is correct then
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the lock can be opened and it seems or
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maybe this is for example there are seats
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Hi cool part people want to sit position
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approximately how many variations of sitting order
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can eh what happens yes from the four
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chairs earlier four people sit on the four
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chairs earlier for example Ningxia on the edge
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could be sia in the middle or is it in the
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middle here or is it at the end
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later B where can go back and forth
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how many variations will be the material
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that can calculate it so
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by studying this tire later There are lots of
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materials in everyday life examples
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in everyday life that you can
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solve both for the material of the
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counting rules this will be divided into the
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first multiplication rule mother sum
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second there is mutation third there is
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combination for the permutation itself there
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are three types first permutation
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with all different elements permutation with
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only a few elements that are the same there are the
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same elements and cyclical permutation
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Oh yes later how we will discuss in
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more detail in the next videos
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for this time we will go into the rules
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or rules of addition and multiplication
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hi okay first the rules of addition to
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understand the rules of addition pay attention to the
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following illustration for example on the
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table How many do we have there are eight
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pens and 9 pencils we want to write here
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grab the event choose one pen or one
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pencil we choose just one here
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can be pens can be pencils we choose just one
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approximately How many ways are there to choose
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80 pen 9 Kansil note that
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the event is choosing One fan only
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or one pencil only not a pen and
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pencil at the same time So it's not taking a
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pen one pencil one not what is
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taken is can a pencil can a
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pen but taking I take it
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just one like that then the number of ways to choose
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is this is the choice there are 9
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choices if all modifiers are one
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then it will be added
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Hi m1 and m2 are eight plus 9 there are
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17 ways or 17 choices well like that
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Well this is what is meant by the
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addition rule So the possibilities will be
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added the first how much the second
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how much just in the total Okay
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specifically the addition rule states if
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the rule if the first event can
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occur in m ways and the second event
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separately yes can occur in n
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ways of spelling Dian first or this is our
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Hi So the first or second event
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can occur in m + n or
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the road Lebak pen or pencil then
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take just one then it can be
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added for example from city A to city
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B there are eight buses
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Hi there are five planes Then want to go
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from a to b then just choose one of them
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Ma'am only or train only or
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plane invite then the choice is only
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this number eight in addition to 5
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because it will choose only one like that
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In general the addition rule
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states if the first event can
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occur M1 events2 N2 events 3 M 3
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and so on until the KPI event is
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mp5k just add them up m 1-2-3
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add and so on until NP the key
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is just add up all the
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possibilities Okay, to make it easier, let's take the
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red balls 5 yellow balls and 6 blue balls
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how many possibilities to
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take just one ball red or blue
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or yellow yes So there are so many sugars
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Just one more that is
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how many possibilities there are this just
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you just add up four plus 5
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plus six like Batam 599 + 6 15
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ways or 15 possibilities are very easy
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not just add them up yes class 11 MIPA 1
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consists of 16 male students and 20
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female students or male students yes one student
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is chosen to represent his class to
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take part in the speech competition How many
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ways to choose a representative from the class are
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male 16 female 20 then
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the number of ways to choose there are 16 plus
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20 because it can be male or female
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there third from city A to city B this is
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what I gave an example of earlier yes from
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my city but there are several choices of
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transportation modes that can be chosen for example there
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are eight buses 4 airplanes
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and 3 trains How many
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different ways to go from city A
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of the vehicles just one
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means he can choose 8 plus or
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four buses or jump on a plane yes or
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three trains in total alone can
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name 12 plus 3-15 next a
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bicycle shop sells five brands of bicycles
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yes these are the brands a-b-c-d-e-f-g-a and
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or which are available as in the table
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beside So they have six bicycles
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6 in stock yes b there are three CD4 and so on the
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band wants to buy just one bicycle from
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the shop How many choices of
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bicycles can be bought
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this by Benny earlier yes just in
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total this is the total yes 6
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Hi plus 3 plus 4 plus 2 plus 10
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Hi you plus 399 plus 4 1313 same
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1515 same 10 25 okay There are 25 choices of
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bicycles that Benny can buy, well, that
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was the addition rule, so
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the process is very easy, just
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add them up. Okay, we will continue
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in the next video. Collect Idah
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multiplication, see you later. Please watch the
