Question

IF A and B are the subsets of universal set U . if n(A)=10 n(B)=20 n(U)=60 n(A'nn B')=40 then n(A nn B)=................​

Answer 1

Step-by-step explanation:

Given,

n(A)=10

n(B)=2

n(U)=60

n(A౧B) = 40

Now, n(AUB) = n(A) + n(B) - n(A౧B)

= 10 + 2 - 40

= 12 - 40

= - 28

Answer 2

Step-by-step explanation:

given

A = 10

B = 20

C = 40

( AuB ) = n(A) + n( B) - ( AnB)

= 10 + 20 -40

= 30 - 40

= - 10

( AuB) is - 10