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30 May, 09:25

Consider a collection of envelopes consisting of 3 red envelopes ​, 2 blue envelopes ​, 1 green envelope ​, and 3 yellow envelopes. If three envelopes are selected at​ random, without​ replacement, determine the probability that they are all yellow envelopes.

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  1. 30 May, 09:37
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    1/84

    Step-by-step explanation:

    3+2+1+3 = 9

    3/9 * 2/8 * 1/7 = 1/84

    = 0.0119047619

    = 0.0119 (3 sf)
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