In how many different ways can the letters of the word OPERATE be arranged ?
A. 360
B. 720
C. 5040
D. 2520
E. None of these
Answer: Option D
Solution (By Examveda Team)
The given word contains 7 letters out of which E is taken 2 times and all other letters are different .∴ Required number of ways
$$\eqalign{ & = \frac{{7!}}{{2!}} \cr & = \frac{{7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1}}{2} \cr & = 2520 \cr} $$
This Question Belongs to Arithmetic Ability >> Permutation And Combination
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