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7 November, 18:09

A bonus activity in a popular video game allows the gamer to choose from several boxes to aquire a rare and useful item. The probability of success is 0.2. With 35 attempts, find the standard deviation. O 2.4 O 7.0 O 5.6 O 0.2

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  1. 7 November, 18:24
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    Answer: the standard deviation is 2.4

    Step-by-step explanation:

    The formula for standard deviation is expressed as

    s = √npq

    Where

    p = probability of success

    q = probability of failure

    n = number of samples

    From the information given,

    The probability of success, p is given as 0.2. It means that the probability of failure, q will be 1 - p = 1 - 0.2 = 0.8

    There were 35 attempts. This means that total number of samples, n is 35

    The standard deviation becomes

    √35*0.2*0.8 = √5.6 = 2.366

    Approximately 2.4
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