Kaidah Penjumlahan

Hi assalamualaikum warahmatullahi

wabarakatuh Okay meet me again

nurseffi on the channel vs mathematics

this time we go into the compulsory Mathematics material for

grade 12 semester 2, namely the

counting rules in it there will be

addition rules Multiplication rules there are

permutations and combinations okay first

we go to the addition rules but

before that we first get to know the

term counting rules

Hi so there are many real examples in

everyday life related

to counting rules for example

on our Android there is a screen lock feature

or screen lock that uses

this yes even though there is a ball there is

also a password I take a simple example,

namely the pin pin usually consists of

4 digits the padi will be chosen freely from the

numbers 1 2 3 4 5 to zero yes 9

there and zero well these 4-digits are free to take

those numbers so there are so many

different pin possibilities that can be

made so the opportunity sorry so the

number of fines that can be made is

very much how many approximately How many

pins can be made well That later the

enumeration rule material will

discuss it when we use

these numbers you can be the team

there are conditions for example must

contain zero for example or can not

have any anu and so on that we will discuss later

Hi in this enumeration rule material Hi

another example is the number of

vehicle numbers or TNKB license plates Yes

it is different or each city

for the city of Jakarta begins with B for example

Semarang begins with ha and so on then

followed by four digits then

followed by two letters or sometimes three letters

behind the number that approximately

how many different license plates

can be made now if there are variations of letters

4 numbers and there are more letters behind

that later the material is not colonial this

includes this there is a padlock examiner

at that time there are those who use passwords yes

use numbers For example like the one in

this picture now

Hi But if you enter the number

correctly or the teacher is correct then

the lock can be opened and it seems or

maybe this is for example there are seats

in a row 4

Hi cool part people want to sit position

approximately how many variations of sitting order

can eh what happens yes from the four

chairs earlier four people sit on the four

chairs earlier for example Ningxia on the edge

could be sia in the middle or is it in the

middle here or is it at the end

later B where can go back and forth

how many variations will be the material

that can calculate it so

by studying this tire later There are lots of

materials in everyday life examples

in everyday life that you can

solve both for the material of the

counting rules this will be divided into the

first multiplication rule mother sum

second there is mutation third there is

combination for the permutation itself there

are three types first permutation

with all different elements permutation with

only a few elements that are the same there are the

same elements and cyclical permutation

Oh yes later how we will discuss in

more detail in the next videos

for this time we will go into the rules

or rules of addition and multiplication

first

hi okay first the rules of addition to

understand the rules of addition pay attention to the

following illustration for example on the

table How many do we have there are eight

pens and 9 pencils we want to write here

grab the event choose one pen or one

pencil we choose just one here

can be pens can be pencils we choose just one

approximately How many ways are there to choose

80 pen 9 Kansil note that

the event is choosing One fan only

or one pencil only not a pen and

pencil at the same time So it's not taking a

pen one pencil one not what is

taken is can a pencil can a

pen but taking I take it

just one like that then the number of ways to choose

is this is the choice there are 9

choices if all modifiers are one

then it will be added

Hi m1 and m2 are eight plus 9 there are

17 ways or 17 choices well like that

Well this is what is meant by the

addition rule So the possibilities will be

added the first how much the second

how much just in the total Okay

specifically the addition rule states if

the rule if the first event can

occur in m ways and the second event

separately yes can occur in n

ways of spelling Dian first or this is our

girl Dewi or

Hi So the first or second event

can occur in m + n or

the road Lebak pen or pencil then

take just one then it can be

added for example from city A to city

B there are eight buses

Hi there are 4

Hi trains

Hi there are five planes Then want to go

from a to b then just choose one of them

Ma'am only or train only or

plane invite then the choice is only

this number eight in addition to 5

because it will choose only one like that

In general the addition rule

states if the first event can

occur M1 events2 N2 events 3 M 3

and so on until the KPI event is

mp5k just add them up m 1-2-3

add and so on until NP the key

is just add up all the

possibilities Okay, to make it easier, let's take the

example of

the lounge

in a bag there are 4

red balls 5 yellow balls and 6 blue balls

how many possibilities to

take just one ball red or blue

or yellow yes So there are so many sugars

Just one more that is

how many possibilities there are this just

you just add up four plus 5

plus six like Batam 599 + 6 15

ways or 15 possibilities are very easy

not just add them up yes class 11 MIPA 1

consists of 16 male students and 20

female students or male students yes one student

is chosen to represent his class to

take part in the speech competition How many

ways to choose a representative from the class are

male 16 female 20 then

the number of ways to choose there are 16 plus

20 because it can be male or female

yes

E36

there third from city A to city B this is

what I gave an example of earlier yes from

my city but there are several choices of

transportation modes that can be chosen for example there

are eight buses 4 airplanes

and 3 trains How many

different ways to go from city A

to city B using one

of the vehicles just one

means he can choose 8 plus or

four buses or jump on a plane yes or

three trains in total alone can

name 12 plus 3-15 next a

bicycle shop sells five brands of bicycles

yes these are the brands a-b-c-d-e-f-g-a and

or which are available as in the table

beside So they have six bicycles

6 in stock yes b there are three CD4 and so on the

band wants to buy just one bicycle from

the shop How many choices of

bicycles can be bought

this by Benny earlier yes just in

total this is the total yes 6

Hi plus 3 plus 4 plus 2 plus 10

Hi you plus 399 plus 4 1313 same

1515 same 10 25 okay There are 25 choices of

bicycles that Benny can buy, well, that

was the addition rule, so

the process is very easy, just

add them up. Okay, we will continue

in the next video. Collect Idah

multiplication, see you later. Please watch the

next video.