Question

4.The probabilities of two events A and B are 0.25 and 0.40 respectively.The probability that both the events occur is 0.15.Find the probability that neither A nor B occurs. (Ans.0.5)

Answer 1

Using formula

P(E or F) = P(E) + P(F) - P(E intersection F)

= (0.25 + 0.40 - 0.15)

= 0.50

Therefore probability that neither A nor B occurs
= 1-(.50)= .50