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Math Help - [SOLVED] 10 marbles in a set- 7 red, 3 green. P(1 green) in sample of 5 ?

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    [SOLVED] 10 marbles in a set- 7 red, 3 green. P(1 green) in sample of 5 ?

    A bag contains 10 marbles - 7 red, and 3 green. What is the probability that there will be exactly 1 green marble in a sample of 3?

    Is it:
     \frac{3}{10} * \frac{7}{9} * \frac{6}{8} * 3C1  ?
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  2. #2
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    Is that equal to \frac{{3 \choose 1}{7 \choose 2}}{{10 \choose 3}}?
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  3. #3
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    Quote Originally Posted by Plato View Post
    Is that equal to \frac{{3 \choose 1}{7 \choose 2}}{{10 \choose 3}}?
    Yeah, apparently it is. Thank you.
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