In how many ways can the letters of the word 'LEADER' be arranged?
A. 72
B. 144
C. 360
D. 720
E. None of these
Answer: Option C
Solution (By Examveda Team)
The word 'LEADER' contains 6 letters, namely 1L, 2E, 1A, 1D and 1R.∴ Required number of ways $$ = \frac{{6!}}{{\left( {1!} \right)\left( {2!} \right)\left( {1!} \right)\left( {1!} \right)\left( {1!} \right)}} = 360$$
This Question Belongs to Arithmetic Ability >> Permutation And Combination
LEADER = 6! / 2!
That is, 720/2 = 360.
6 letters and 2E repeating