Class 11MathematicsPermutation and CombinationDefinition of permutation, Number of permutations with or without repetition, Conditional permutations
DifficultThe sum of all numbers formed by using all the digits $3, 1, 7, 9$ exactly once is:
- A$32768$
- B$133320$
- C$134200$
- D$390625$
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Easy
View SolutionThe number of words that can be formed using the letters of the word $VOWEL$ such that the vowels always remain together is
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