Question

If B C A, then n(AUB) is 1. n(A-B) 2.n(B), 4.n(A)​

Answer 1

Step-by-step explanation:

given :

If B C A, then n(AUB) is 1. n(A-B) 2.n(B), 4.n(A)

to find :

If B C A, then n

solution :

b) n( A- B )

hence, the answer is n ( a-b)

Answer 2

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