Given that n\left ( A\cup B \right )= 100,n\left ( A\cap B \right )= 20,n\left ( A \right )= 50\: \: and\: \: n\left ( U \right )= 150.\: \: Find\: \; n\left ( A'\cup B' \right )

Answers (1)

Given, n\left ( A\cup B \right )= 100,n\left ( A\cap B \right )= 20,n\left ( A \right )= 50\: \: and\: \: n\left ( U \right )= 150.\: \: Find\: \; n\left ( A'\cup B' \right )

n(A'\cup B')=n(A\cap B)' = n(U)-n(A\cap B)

= 150-20 = 130

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