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Question
Probability of an event A + Probability of event 'not A' = ______.
Fill in the Blanks
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Solution
Probability of an event A + Probability of event 'not A' = 1.
Explanation:
The event 'not A' is denoted by `bar(A)` or A'.
Since A and `bar(A)` are complementary events `P(A) + P(bar(A)) = 1`.
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