Discussion

Explanation:

Let the chairs be numbered as 1  2  3  4  5  6.

First person can be chaired on any of the 6 chairs i.e., in 6C1 = 6 ways.

Now, out of the remaining 5 chairs, the 2nd person can be chaired in 5C1 = 5 ways.

Similarly, 

3rd person can be chaired in 4 ways.
4th person can be chaired in 3 ways.

∴ Total number of ways of chairing these 6 people in a row = 6 × 5 × 4 × 3 = 360 ways.

Hence, 360.

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