Question

If n(A) = 35, n(B)= 42,n(A n B)= 17 and n (AUB)' = 22 then n(U) =​

Answer 1

Answer:

n(AUB) = n(A) + n(B) —n(AnB) = 35+42—17=60

n(U) = 60+22 = 82 ans.

Answer 2

Answer:

It must be 82

Step-by-step explanation:

we know

n(AUB)= n(A) +n(B)-n(AπB)

= 35+42-17

=60

Also,

n(AUB)'=n(U)-n(AUB)

=>n(U) =n (AUB) '+n(AUB)

= 22+60

=82