Class 11MathematicsPermutation and CombinationDefinition of permutation, Number of permutations with or without repetition, Conditional permutations
EasyThe number of ways in which $6$ distinct rings can be worn on the $4$ fingers of one hand is
- A$4^6$
- B$^6C_4$
- C$6^4$
- DNone of these
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How many $4$-letter codes can be formed using the first $10$ letters of the English alphabet,if no letter can be repeated?
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