Question 1199736
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Since the events A and B are independent,  P(A and B) = P(A)*P(B).


In other words,  0.12 = 0.24*P(B).


It gives  P(B) = {{{0.12/0.24}}} = {{{1/2}}} = 0.5 = 50%.    <U>ANSWER</U>
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Solved.