SETS 2

If n(A)= 50 , n(B)= 90 and n(AnB)=30, find n(AuB).

Solution

n(AuB) = n(A) + n(B) - n(AnB)

            = 50 + 90 – 30

            = 140 – 30

            = 110

Hence n(AuB) = 110 answer

TRY THIS………….

If n(A)= 86 , n(B)= 90 and n(AnB)=78, find n(AuB).