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Question

If n(A)=20 and n(B)=30 and n(A U B) = 40 then n(A ∩ B) is?

a.

20

b.

30

c.

40

d.

10

Posted under Discrete Mathematics

Answer: (d).10

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Q. If n(A)=20 and n(B)=30 and n(A U B) = 40 then n(A ∩ B) is?

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