A)The probability that a student passes Mathematics is and the probability that he passes English is . If the probability that he will pass at least one subject is , what is the probability that he will pass both subjects? It is possible for a student to either:

Pass math only

Pass English only

Pass both math and English.
B)If the independent probabilities that three people A, B and C will be alive in 30 years time are 0.4, 0.3, 0.2 respectively, calculate the probability that in 30 years’ time,
(a) all will be alive