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[plush bison]

what have you tried?

[vestal escarp]

a few things like drawing some diagrams and just thinking, can you give me a sec, i'll give this a solid try

[plush bison]

number of favourable outcomes/total outcomes

[vestal escarp]

I'm not really sure on how to do this question

[vestal escarp]

can you expand

[plush bison]

u gotta use permutation combination

for total outcomes it would be

[vestal escarp]

I haven't learnt combi or perms

[plush bison]

in that case , i think it's just 3/7

since there are 3 girls

and 7 people

wait

no

[vestal escarp]

no, the answer is 7/15

[plush bison]

7/11

how many committees can you form where (at least) one member is a girl

it cant be 7/15 :/

[plush bison]

how many can you form where both are girls

[vestal escarp]

3?

[plush bison]

there’s 4 boys and 8 girls

you can make a few more than 3

@vestal escarpare u SURE it is 7/15

[vestal escarp]

yeah, it says on the answers, could be wrong tho

[plush bison]

should be 7/11

[vestal escarp]

4*8 + the combinations within the boys and the combinations within the girls

if u want the solution here it is

but i have no idea what';s going on

because i haven't studied this notation

[plush bison]

u did say u didnt learn combinations

but it's combinations

[vestal escarp]

i didn't

it's a probability chapter, we haven;t started combi yet

[plush bison]

it's the notation of combination

if im not mistaken

[vestal escarp]

how are there 66 elements

there should be more?

[plush bison]

12!/12-2! * 2!

= 11*6

=66

go learn combinations bro

[vestal escarp]

I will, but later 😭

[plush bison]

then do this ques later

[vestal escarp]

yeah, i'll skip it for now

I'll leave this open though if someone can do without combi

[plush bison]

😭 it's not possible

u would need to manually count every possibility

[vestal escarp]

😭

[plush bison]

@vestal escarp anyway i can explain you the overview without u needing to know combinations

[vestal escarp]

alright

[plush bison]

for total outcomes you choose combinations of 2 out of the total 12

so its 12C2

since there it atleast 1 girl

we need to subtract 4C2

which are the combinations in which both are boys

so with formulae and shi we get 66-6

=60

then for favourable outcome

we choose 2 girls out of the 8 we have which is 8C2

which gives u 28 on solving and shi

so 28/60

=7/15

[vestal escarp]

I see

thanks @plush bison

[crisp axle]

@vestal escarp has given 1 rep to @cloud granite

[vestal escarp]

Iguess I'll close this now

cya

[plush bison]

yea

[vestal escarp]

+close