Question

13.If A and B are two sets such that
n(A)= 70, n(B) = 60 and n(AUB)=110
then n(AB) is equal to

1) 240 2)503) 40 4) 20​

Answer 1

Step-by-step explanation:

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

=70 + 60 - 110

=130-110

. =20.

Your answer is

4)20

Answer 2

4. n(AB) is equal to 20

Step-by-step explanation:

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n(AUB) = n(A) + n(B) + n(AnB)

110 = 60 + 70 + n(AnB)

n(AnB) = 20