Question

A bag has 1red, 3 blue, and 4 green marbels. Out come A is drawing a green marble on the first draw. Out come B is drawing a green marble on the second draw without replacing the first marble.

What is P(B|A)?
P(B|A) = ?/?

Answer 1

P(A)=2/4=1/2
P(B|A)=3/8

Answer 2

P(A)=4/8=1/2
P(B|A)=3/7