In n(A) = 20, n(B) = 35 and n(A ∪ B) = 45, then n (A ∩ B) equals

1.	In n(A) = 20, n(B) = 35 and n(A ∪ B) = 45, then n (A ∩ B) equals
A.	10
B.	15
C.	0
D.	None of these
Answer» B. 15

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In n(A) = 20, n(B) = 35 and n(A ∪ B) = 45, then n (A ∩ B) equals

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