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If A and B are any two events, then the ...

If A and B are any two events, then the probability that exactly one of them occurs is

A

1) `P(A) + P(B) - 2P(A nn B)`

B

2) `P(A) + P(B) + P(A nn B)`

C

3) `p_(1)+p_(2)-p_(1)p_(2)`

D

4) `P(A) + P(B) - P(A nn B)`

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The correct Answer is:
A
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