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Let A and B be two events such that P(A)=0.25, P(B)=0.50 and P(A ∩ B)=0.14. The probability that neither A nor B occurs is:

Solution

Correct Option: 3

Given:

P(A)=0.25P(A) = 0.25

P(B)=0.50P(B) = 0.50

P(AB)=0.14P(A ∩ B) = 0.14

To find P(neither A nor B) =P(AB)=1P(AB)= P(A' ∩ B') = 1 - P(A ∪ B)

Using: P(AB)=P(A)+P(B)P(AB)P(A ∪ B) = P(A) + P(B) - P(A ∩ B)

=0.25+0.500.14= 0.25 + 0.50 - 0.14

=0.61= 0.61

Therefore, P(neither A nor B) =10.61=0.39= 1 - 0.61 = 0.39

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