If P(A) and P(not A) are complementary events and P(A) = 0.15, then P(not A) = ?

0.85

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0.35

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Cannot be determined

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0.3

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Solution

The correct option is A
0.85

Given, P (A) = 0.15
As, P(A) and P(not A) are complementary events, P(A) + P(not A) = 1
P (not A) = 1 – P (A) = 1 – 0.15 = 0.85

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