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If a person has coins of different denominations, the number of different sums can be formed is
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Important Questions on Permutations and Combinations
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The number of ways of distributing eight identical rings to three different girls so that every girl gets at least one ring is
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In how many ways balls can be picked from black and green colored balls such that at least one black ball is selected?
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A set contains elements. The number of subsets of the set which contain at most elements is
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For which value of has trailing zeros?
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If all the seven letters of the word LEADING are permuted in all possible ways and the words thus formed are arranged as in the dictionary order, then the word in place is
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There are identical white balls and identical black balls. The number of distinguishable arrangements in a row of all the balls, so that no two black balls are adjacent is
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For is equal to
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In how many ways can examination papers be arranged so that the best and the worst papers are never together?
