SETS 1

If n(A)= 170 , n(B)= 160 and n(AnB)=150, find n(AuB).

Solution

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

             = 170 + 160 – 150

             = 330 – 150

             = 180

Hence n(AuB) = 180 answer

TRY THIS…………………………….

If n(A)= 146 , n(B)= 164 and n(AnB)=130, find n(AuB).