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19 July, 11:05

Assume that the probability of an athlete exercising less than 4 days per week is 40%. Use the number of days per week of your first subject as a x in the following calculation. Determine the probability of X out of 20 subject exercised less than 4 days per week

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  1. 19 July, 14:37
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    Probability = 0.16587

    Step-by-step explanation:

    Probability of less than = 0.4 = p

    Probability of greater than = 1-0.4 = 0.6 = q

    Total number of outcome n = 20

    Expected outcome x = 7

    Probability of 7 out of 20

    = 20C7 (0.4) ^7 * (0.6) ^ (20-7)

    = 20C7 * (0.4) ^7 * (0.6) ^13

    = 77520 * (1.6384*10^-3) * (1.306*10^-3)

    = 0.16587
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