Permutations And Combinations Question 2

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

Options:

A) $ \frac{1}{2}4! $

B) $ \frac{1}{2}5! $

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 anticlockwise are same in case of ring}.



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