Question

If n(A ∪ B)=49, n(A ∩ B)=24, and n(B)=27, find n(A).

Answer 1

46

Explanation:

n(A U B)= n(A) + n(B) - n(A ∩ B)

n(A)= n(A U B) - n(B) + n(A ∩ B)=49-27+24 =46

Hope, this helps you.