Permutation and Combination - Arithmetic Aptitude Questions and Answers

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In how many ways can the letters of the word 'LEADER' be arranged?

144

360

720

None of these

Answer : Option C

Explanation :

The word 'LEADER' contains 6 letters, namely 1L, 2E, 1A, 1D and 1R.

Required number of ways = $\frac { 6! } {(1!) (2!)(1!)(1!)(1!)} =360$

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