Question

If n(A) = 15, n(AUB) - 29. n(
AB) = 7 then n (B) = ?
​

Answer 1

Step-by-step explanation:

as we know that

n(AUB)=n(A) + n (B) - n(AB)

n (B)=n(AUB)-n(A) + n(AB)

=29- 15 +7

=21