Posted by **keisha** on Sunday, March 14, 2010 at 8:11pm.

refer to a bag of marbles containing 5 green marbles, 4 red marbles and 2 yellow marbles. Three marbles are drawn from the bag, without replacement. What is the probabilty that all three marbles drawn are green?

- statistics -
**Damon**, Sunday, March 14, 2010 at 8:20pm
11 marbles, 5 green

probability that #1 is green = 5/11

now 10 marbles, 4 green

probability that #2 is green = 4/10

now 9 marbles, 3 green

probability that #3 is green = 3/9

so

5/11 * 2/5 * 1/3

= 2/33

- statistics -
**keisha**, Sunday, March 14, 2010 at 8:42pm
thanks what is the probability that at least one of the marbles drawn is green? I thinks it's 1/11 but not sure.

Then what is the probability that only one of the marbles drawn are green?

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