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aburchett
02-09-2011, 12:39 PM
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
02-09-2011, 03:15 PM
Looks like it to me. You need a hat full of colored socks to test out your conjectures.