2
Q:
A) 2 x (17!) | B) 2 x (18!) |
C) (3!) x (18!) | D) (17!) |
Answer: B) 2 x (18!)
Explanation:
Explanation:
A person can be chosen out of 18 people in 18 ways to be seated between Musharraf and Manmohan. Now consider Musharraf, Manmohan, and the third person, sitting between them, as a single personality, we can arrange them in 17! ways but Musharraf and Manmohan can also be arranged in 2 ways.
Required number of permutations = 18 x (17!) x 2 = 2 x 18!