Question

B] Solve the following question (1 mark each)
12.
1) If n (A) = 15, n (A È B) = 29, n (AÇ B) = 7 then n (B) = ?​

Answer 1

Answer:

ANSWER

n(A∪B)=n(A)+n(B)−n(A∩B)−−−−−−−(1)

Given n(A)=7

n(B)=9

n(A∪B)=14

Substituting in 1

14=7+9−n(A∩B)

⇒n(A∩B)=16−14=2