Class 11MathematicsPermutation and CombinationDefinition of permutation, Number of permutations with or without repetition, Conditional permutations
EasyEvaluate $7! - 5!$
- A$4920$
- B$5040$
- C$4800$
- D$5160$
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Similar Questions
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:
How many words,with or without meaning,each of $3$ vowels and $2$ consonants can be formed from the letters of the word $INVOLUTE$?
Medium
View SolutionThe letters of the word '$MANKIND$' are written in all possible orders and arranged in serial order as in an English dictionary. Then the serial number of the word '$MANKIND$' is $.....$
If the letters of the word $SACHIN$ are arranged in all possible ways and these words are listed in dictionary order,what is the rank of the word $SACHIN$?
Difficult
View SolutionIf ${}^n{P_5} = 20 \times {}^n{P_3}$,then $n = $
Easy
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