Question

If n(ξ) = 120, n(A’) = 60,n(B) = 70, and n(AՈB) = 20find n((AUB)’)

Answer 1

Solution :

n(A) – n(AUB)

n(A) – n(A⋂B)

n(B) – n(A⋂B)

n( ξ) – n(AUB) where ξ means Universal Set

n(A) – n(AUB)

n(A) – n(A⋂B)

n(B) – n(A⋂B)

n( ξ) – n(AUB) where ξ means Universal Set​