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Today, 19:58

A sample of 3 different calculators is randomly selected from a group containing 17 that are bad and 36 that are good. What is the probability that all three calculators are good? What is the probability that all three calculators are bad? Write your answer with three decimal places

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  1. Today, 20:16
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    1) 210/689

    2) 20/689

    Step-by-step explanation:

    Total: 36 + 17 = 53

    All good: 36C3/53C3

    = 210/689 or 0.0305 (3 sf)

    All bad: 17C3/53C3

    = 20/689 or 0.029 (3 sf)
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