Q. 94.2( 54 Votes )

If A and B are tw

Answer :

Given: P (A) =, P (B) = and P (A ∩ B) =

P(not A and not B) = P(A^’ ∩ B^’)

As, { A^’ ∩ B^’ =(A ∪ B)^’}

⇒ P(not A and not B) = P ((A ∪ B)^’)

= 1 - P (A ∪ B)

= 1- [P(A) + P(B) - P (A ∩ B)]

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