Class 11MathematicsPermutations and CombinationsDefinition of permutation, Number of permutations with or without repetition, Conditional permutations
DifficultThe number of ways in which $n$ boys and $n$ girls can be arranged in a row such that all the boys are together and all the girls are also together is equal to
- Athe number of ways in which $n$ boys and $n$ girls can be arranged in a row
- Bthe number of ways in which $n$ boys and $n$ girls can be arranged in a row such that all the girls are together
- Cthe number of ways in which $n$ boys and $n$ girls can be arranged in a row such that no two girls are together
- Dnone of these
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