If A and B are finite sets. which of the following is the correct stat – InterviewSolution

InterviewSolution

1.

If A and B are finite sets. which of the following is the correct statement.(a) n (A – B) = n (A) – n (B) (b) n (A – B) = n (B – A) (c) n (A – B) = n (A) – n (A ∩ B) (d) n (A – B) = n (B) – n (A ∩ B)

Answer»

(c) n (A – B) = n (A) – n (A ∩ B)

n (A – B) = No. of these elements of A which are not common in A and B

= n (A) – n (A ∩ B)

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