Question 1092590
A.  Probability(P) of 3 red is (3/12) * (2/11) * (1/10) = 0.0045
P of 3 green is (4/12) * (3/11) * (2/10) = 0.0182
P of 3 yellow is (5/12) * (4/11) * (3/10) = 0.0455
P of 3 red or 3 green or 3 yellow = 0.0045 + 0.0182 + 0.0455 = 0.0682
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B.  P of 3 different colors = (3/12) * (4/11) * (5/10) = 0.0455
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