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22 September, 18:05

A jar contains five blue marbles and three red marbles. Suppose you choose a marble at random, and do not replace it. Then you choose a second marble. Find the probability of the following event. Both of the selected marbles are red.

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  1. 22 September, 19:42
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    For the first event

    P=3 / (5+3) = 3/8=0.375

    Total became 2 red and 5 blue ... 7 total

    For the second event

    P=2 / (5+2) = 2/7 = 0.2857
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