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8 October, 22:15

A travel website reports that in a particular city, the probability of rain on any day in April is 40%. What is the expected number of rainy days in this city during the month of April?

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  1. 8 October, 22:38
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    There are 30 days in April. To solve this question, we simply multiply the days by the rate:

    0.4 (30)

    (0.4 represents 40%)

    Multiply:

    0.4 (30) = 12

    The expected amount of rainy days is 12 days.
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