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17 September, 08:37

Nikolai has a jar filled with 120 marbles. he has 72 red marbles, 17 blue marbles, 13 green marbles, and 18 purple marbles. what is the probability that he will randomly select a blue marble, without replacement, and then a purple marble from the jar

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  1. 17 September, 12:12
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    To find the probability of both of these occurring, you will multiply the probability of choosing a blue marble by the probability of choosing a purple marble (with no replacement after the first one).

    Probability of choosing a blue marble: 17/120

    Probability of choosing a purple marble: 18/119

    17/120 x 18/119 = 3/140

    You will have a 3/140 chance of both of these occurring.
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