Class 11MathematicsPermutation and CombinationDefinition of permutation, Number of permutations with or without repetition, Conditional permutations
EasyIf the best and the worst paper never appear together,then in how many ways can $6$ examination papers be arranged?
- A$120$
- B$480$
- C$240$
- DNone of these
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If all the digits in the number $53426$ are permuted in all possible ways and are arranged in decreasing order,then the number having rank $89$ is:
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