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[Post New]2 Dec 2007 00:18:39 IST
    Subject: Good question of Permutations & combination.
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tarinbansal (3952)

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Olaaa!! Perrrfect answer. 678  [959 rates]
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How many 6 digit numbers are there such that any digit that appears in the number appears at least twice.
(Example-225252 is an admissible number while 222133 is not)
Numbers are to be chosen from the set {1,2,3,4,5}
 
I don't know the answer. Please post ur solutions.
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