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IMPORTANT
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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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Important Questions on Permutations and Combinations
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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?
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The value of is ______.
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The number of ways in which boys and girls can sit on a bench so that no two boys are adjacent is ______
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Six persons and are to be seated at a circular table facing towards the centre. Then the number of ways that can be done if must have either or on his immediate right and must have either or on his immediate right, is
