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Question

Events A and B are such that P(not A or not B) = 0.44. State whether A and B are mutually exclusive events. (Yes/No)


A

Yes

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B

No

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Solution

The correct option is B

No


P(not A or not B) =P(A’B’) = 0.44

P(A’B’) = P((AB)’) = 0.44 ……………………… (1)

P(AB) = 1 – P((AB)’)

= 1- 0.44

= 0.56 ……………………………… (2)

Two events A and B are mutually exclusive if P(AB) = 0


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