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11 November, 23:45

There are five boys and five girls in a class. The teacher randomly selects three different students to answer questions. The first student is a girl, the second student is a boy, and the third student is a girl. Find the probability of this occuring.

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  1. 12 November, 00:03
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    The probability that the first student is a girl is 5/10.

    The probability of the second selection being a boy is 5/9.

    (since the first selection was a girl, there are 9 students left)

    The probability that the third student is a girl is 4/8

    (there are 4 girls left after one was selected, and 8 students left in total, after the second selection.

    The probability is (5/10) (5/9) (4/8) = 0.139

    Answer: 0.139
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