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Complementary Event

The probabili...

Question

The probability of a day being rainy is 0.75, then the probability of it not being a rainy day is .

A

0.79

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B

0.25

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C

0.50

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D

0.36

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Solution

The correct option is B $0.25$
Given that probability of a day being rainy is $0.75.$
$P (E) + P (E^{'}) = 1$
So, probability of the day not being rainy is $1 - 0.75 = 0.25$

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