Subject: General Aptitude · Chapter: Permutations and Combinations · Exam: 2009 · Marks: · Difficulty:
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
Answer (as printed): D
Explanation
The given word contains 7 letters out of which E is taken 2 times and all other letters are different. ∴ Required number of ways 7 7 ×6×5×4×3×2×1 = = = 2520. 2 2
Explanation as extracted from the printed page; notation may be imperfect.