AP ICET 2015 Paper

Question : 115 of 200

Marks: +1, -0

If A, B are two sets such that

n(A-B)=40,n(B-A)=57

and

n(AnB)=16

, then

n(A)=

Solution:

Given :

n(A–B)=40,n(B–A)=57,n(A∩B)=16

We have,

n(A)=n(A–B)+n(A∩B)

⇒n(A)=40+16=56

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