<PRE><B>Question 352933</B>
a girl has 10 yellow, 10 red, and 10 green marbles. She picks two marbles out at random and gives them to her sister
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a.) what is the probability of choosing 2 yellow marbles?
P(2 yellow) = 10C2/30C2 = 0.1034
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b.) of the marbles left what is the probability of choosing a green marble next?
P(green after 2 yellow) = 10/28
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c.)of the marbles left, what color has the probability of 1/3 of being picked? explain how you determined your answer.
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27 marbles are left
There are 9 green left.
P(green) = 9/27 = 1/3
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Cheers,
Stan H. </PRE>