Question

If n(A-B) = 20, n(AUB) = 60, n(ANB)=10 where A
and B are any two sets, then find n(B-A)​

Answer 1

Answer:

30.

Step-by-step explanation:

here use formula

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

60=20+10+n(B-A)

n(B-A)=30