question on probability

[tired inlet]

send the answer in terms of binomial coefficients i want to check smth

[fringe burrow]

What have you tried

Ig you use Bayes here

Also show your work

[willow meadow]

it will be this i think

[fringe burrow]

Twice of that

[willow meadow]

hm

no i dont think so

[tired inlet]

exactly this but the answer doesnt match

[fringe burrow]

Why

[tired inlet]

i think it must be a type in the book

[willow meadow]

yea

[tired inlet]

in the book, in the 2nd part of this fraction the denominator contains 12C1 instead of 12C2

[willow meadow]

the *2 is already included in the binomial coefficient
(w)(r)
(1)(1)

this counts both orders automatically

[fringe burrow]

You got two cases where you draw white first and second

[willow meadow]

yea cuz its a pretty common confusion cuz ur book solved the problem in a different but valid way

[willow meadow]

yes there are two orders but when we write this it already counts both WR and RW

[fringe burrow]

Ic

[willow meadow]

yea

@tired inlet change the status of the problem to solved