Question

If A and B are two sets such that n(A)=23,n(B)=22 and n(A∪B)=35, then n(A∩B) is: *

Answer 1

Answer:

n(A∩B) = 10

Step-by-step explanation:

n(AUB) = n(A) + n(B) - n(A∩B)

∴ n(A∩B) = n(A) + n(B) - n(AUB)

= 23 + 22 - 35

= 10