Question

X and Y are two sets such that n(X)=33,n(Y)=42 and n(X∪Y)=70, then n(X∩Y) is: *
option a 145
option b 5
option c 10
option d 0​

Answer 1

Answer:

Answer

Correct option is

B

43

n(X∪Y)=n(X)+n(Y)−n(X∩Y)

76=45+n(Y)−12

n(Y)=43