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Question

If A and B be two sets such that n(A)=15,n(B)=25, then number of elements (symmetric difference of A and B)

A
31
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B
16
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C
26
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D
40
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Solution

The correct option is D 40
We have given that
n(A)=15
n(B)=25
Then,
The number of elements (symmetricdifferenceofA and B) =n(A)+n(B)
=15+25
=40
Hence, the option (D) is correct.

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