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Natural Numbers

Let A and B b...

Question

Let A and B be two finite disjoint sets such that n(A U B) = 475 and n(A) = 435, then n(B) is

A

40

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B

75

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C

35

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D

900

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Solution

The correct option is A
40

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Q. Let A and B be two finite sets such that n(A) = 20, n(B) = 28 and n(A ∪ B) = 36, find n(A ∩ B).

A

B

be two finite sets such that

n (A - B) = 30, n (A \cup B) = 180

n (B)

A

B

be two finite sets such that

n (A) = 20

n (B) = 28

n (A \cup B) = 36

n (A \cap B)

.

Let A and B be two sets such that n (A) = 20, n (A \cup B) = 42 and n (A \cap B) = 5 . Then, n (B - A) =

A

B

be two sets such that

n (A) = 70

n (B) = 90

n (A \cup B) = 110

n (A \cap B)

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