what is conditional probability?when to use it?

Question

men and women both are given a set of playing cards.
event A =men drawing ace of club from his set.
event B =women drawing ace of club from his set.
Is event A and B are independent ?If so is P(B/A)=P(B).If not why?

Answer 1

Conditional probability is the probability of some event A, given the occurrence of some other event B. Conditional probability is written P(A|B), and is read "the probability of A, given B".