<PRE><B>Question 861808</B>
A box contains 4 red and 8 green marbles. You reach in and remove 3 marbles all at once. Find the probability that these 3 marbles:
a) are all red.
Ans: 4C3/12C3 =  0.0182
b) are all of the same color.
Ans: (4C3+8C3)/12C3 = 0.2727

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Cheers,
Stan H.
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