Posted by: Guest4 September 24, 2007
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Seems like you need to read the chapter few more times, Pra. :) These questions ask for basic definitions in probability. If you are not clear with it, may be, it would be helpful for you to go over few more times.
P(B/notA)
= P(B and notA)/P(notA)
=[P(B) - P(A and B)]/[1-P(A)]