Question

Let A and B be two subsets of U such that n(A)=7,n(B)=5, n(A intersection B)=0 and n [(AUB)]'=4, and find a: n(AUB)

Answer 1

Step-by-step explanation:

n(A)=7

n(B)=5

n(A intersection B)=0

n(AUB) = n(A) + n(B) - n(A intersection B) = 7+5-0 = 12