Question
 Probability that A will be alive in 20 years is 0.7
and probability that B will be alive in 20 years is 0.6, then what is the probability that they both will be alive in 20 years?Solution
Probability that A will be alive after 20 years = 0.7 Probability that B will be alive after 20 years = 0.6  Assuming both events are independent, the probability that both A and B will be alive after 20 years is:  0.7×0.6=0.42 So, the required probability is 0.42 or 42%.
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