Quantitative Aptitude Ques 787

Question: In how many ways can 5 keys be put in a ring?

Options:

A) $ \frac{4!}{2} $

B) $ \frac{5!}{2} $

C) $ 4! $

D) $ 5! $

Show Answer

Answer:

Correct Answer: A

Solution:

  • Required number of ways $ =\frac{1}{2}(5-1)!=\frac{4!}{2} $ [since, clockwise and anti-clockwise are same in calf of ring]
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