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The joint probability of events A and B is32 percent with the probability of event A being60 percent and the probability of event B being50 percent.
it is64%
If B has occurred, then it is calculated as mr. Vrindavan has given. So it is64%
Here Probability of A = Probability of AB / Probability of B
i.e.32 /50% (The second chance being A is double the joint probability)
=64%.