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:

$\displaystyle \frac{3}{10} * \frac{7}{9} * \frac{6}{8} * 3C1 $ ?

- Dec 8th 2008, 04:04 PMdan569[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:

$\displaystyle \frac{3}{10} * \frac{7}{9} * \frac{6}{8} * 3C1 $ ? - Dec 8th 2008, 05:01 PMPlato
Is that equal to $\displaystyle \frac{{3 \choose 1}{7 \choose 2}}{{10 \choose 3}}$?

- Dec 9th 2008, 01:55 AMdan569