iTeachChem•7mo ago

MATH

how are there 3 ways, why wont 4c2 work

iTeachChem Helper•6/7/25, 6:04 AM

@Apu

iTeachChem Helper•6/7/25, 6:04 AM

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Ccoolguy.how are there 3 ways, why wont 4c2 work

Monishrules•6/10/25, 11:04 AM

Common mistake, if you choose any two objects, the others are also CHOSEN so since you are choosing twice, the order of choice matters

Monishrules•6/10/25, 11:05 AM

You choose once,technically you dont need to choose again

MMonishrules Common mistake, if you choose any two objects, the others are also CHOSEN so sin...

coolguy.OP•6/10/25, 11:08 AM

I didn't quite get it

Ccoolguy.I didn't quite get it

Monishrules•6/10/25, 11:08 AM

i told you to choose between 1,2,3,4

Monishrules•6/10/25, 11:08 AM

you picked 1,2

Monishrules•6/10/25, 11:08 AM

thats different

Monishrules•6/10/25, 11:08 AM

you picked 3,4 thats different

coolguy.OP•6/10/25, 11:08 AM

Right

Monishrules•6/10/25, 11:08 AM

i told you to seperate 1,2,3,4 into two groups

Monishrules•6/10/25, 11:08 AM

you first chose 1,2

Monishrules•6/10/25, 11:08 AM

thats one way

Monishrules•6/10/25, 11:09 AM

but choosing 3,4 is also the same right

coolguy.OP•6/10/25, 11:09 AM

Yeah right

coolguy.OP•6/10/25, 11:09 AM

Lemme read this again

Monishrules•6/10/25, 11:10 AM

im leaving this q to see and test yourself if you understand, suppose i wanted to split 1,2,3,4,5,6 into 3 groups of size 2, the answer should 6c2 times 4c2/3!

coolguy.OP•6/10/25, 11:11 AM

Why did divide by 3! Here

coolguy.OP•6/10/25, 11:11 AM

Cause geouping

coolguy.OP•6/10/25, 11:11 AM

Grouping

Monishrules•6/10/25, 11:11 AM

because you are choosing in a order

Monishrules•6/10/25, 11:12 AM

see consider the case (1,2)(3,4)(5,6)

coolguy.OP•6/10/25, 11:12 AM

Accha accha

Monishrules•6/10/25, 11:12 AM

that is counted once when (1,2)(3,4)(5,6) is made in that order, or (1,2)(5,6)(3,4) etc

coolguy.OP•6/10/25, 11:12 AM

Yeah that i got it won't matter which I pick first

Monishrules•6/10/25, 11:12 AM

yes

coolguy.OP•6/10/25, 11:12 AM

Right

coolguy.OP•6/10/25, 11:13 AM

In the question each clothing has 2 colours in common

Monishrules•6/10/25, 11:13 AM

you just need to split the colour into 2 groups of 2

coolguy.OP•6/10/25, 11:13 AM

The ways to pick pairs with same colors is only 3

coolguy.OP•6/10/25, 11:13 AM

That seems so less

MMonishrules you just need to split the colour into 2 groups of 2

coolguy.OP•6/10/25, 11:13 AM

Okay okay

MMonishrules im leaving this q to see and test yourself if you understand, suppose i wanted t...

Monishrules•6/10/25, 11:14 AM

try to understand this one, if you got it you should get it

Monishrules•6/10/25, 11:14 AM

ok bye

coolguy.OP•6/10/25, 11:14 AM

Alright I'll get back to you thank you

MMonishrules ok bye

coolguy.OP•6/10/25, 11:16 AM

They said to pick of the same color, but which color doesn't matter right

CorrodedCoffin•6/10/25, 11:19 AM

if shirts and skirts are chosen for same colour , u wont have to choose scarves and hats again for diff colour. they are automatically chosen.

coolguy.OP•6/10/25, 12:13 PM

I think I understood you guys

coolguy.OP•6/10/25, 12:13 PM

+solved @Monishrules @hardcoreisdead

iTeachChem Helper•6/10/25, 12:13 PM

Post locked and archived successfully!

Archived by

@765933523705921606 (765933523705921606)

Time

June 10, 2025

Solved by

@861908747444813845 (861908747444813845), @741159941934415883 (741159941934415883)

MATH

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