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11 Feb 2004, 13:57
Kudos
Bookmarks
There are 4 identical balls (same size). Each ball could be either RED or WHITE only. What is the probability that there are 2 RED and 2 WHITE balls?
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11 Feb 2004, 14:34
Kudos
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I get 1/4 as the answer.
Each ball can either be RED or WHITE so we have 4 balls hence 2^4 = 16 combinations. Out of these 2W and 2R occur 4 times as follows
WWRR
RRWW
WRWR
RWRW
Hence 4/16 = 1/4
Each ball can either be RED or WHITE so we have 4 balls hence 2^4 = 16 combinations. Out of these 2W and 2R occur 4 times as follows
WWRR
RRWW
WRWR
RWRW
Hence 4/16 = 1/4
