Question

If n(universal set) = 75, n(A) = 38,n(B) = 45,what is the value of n(A') and n(B').

Answer 1

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Answer 2

$\huge\boxed{\underline{\underline{\green{Solution}}}}$

Let U be the Universal Set

$n(U) = 75 \: , n(A) = 38 \: , \: n(B) = 45$

Hence

$n(A') = n(U) - n(A) = 38 = 75 - 38 = 37$

$n(B') = n(U) - n(B) = 75 - 45 = 30$

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