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31 Aug 2010, 13:23
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N
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25% (01:03) correct
75%
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A deck of cards contain 2 red , 3 blue , 4 green cards. Three cards are drawn with replacement from the deck. What is the probability that all 3 cards are different colors
2/9
3/20
1/5
2/7
8/243
2/9
3/20
1/5
2/7
8/243
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31 Aug 2010, 14:15
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2/9*3/9*4/9 = 8/243
Posted from my mobile device
Posted from my mobile device
31 Aug 2010, 15:17
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rxs0005
1- (RRR+BBB+GGG)
\(1- {(\frac{2}{9}*\frac{2}{9}*\frac{2}{9})+(\frac{3}{9}*\frac{3}{9}*\frac{3}{9})+(\frac{4}{9}*\frac{4}{9}*\frac{4}{9}} = \frac{8+27+64}{9} = \frac{99}{729} = \frac{11}{81}\)
