Question

let A and B be two sets such that n(A)=10 n(AnB) =20 n (AnB) =5 find n=(B)​

Answer 1

Answer:

Step-by-step explanation:

n(A∪B)=n(A)+n(B)−n(A∩B)

n(B)=42−20+4=26

n(A−B)=n(A)−n(A∩B)=20−4=16

n(B−A)=n(B)−n(A∩B)=26−4=22