Determine P(B|A)

[aburchett]

Given that P(A) = 0.5 and P(B) = 0.3, and P(A and B) = 0.21, determine P(B|A).

My work:
P(B|A)=P(A?B)/P(A)
= 0.21/.5
=.42

Is this correct?

 

[tkhunny]

Looks like it to me. You need a hat full of colored socks to test out your conjectures.