Question

In how many ways can 10 people line up at a ticket window of a cinema hall?

• A. 3628800
• B. 3482800
• C. 344800
• D. 3328800
• E. None of these

Answer 1

The correct option is A 3628800

The required number of ways = number of permutations of 10 people taking all 10 at a time.
= P(10, 10) = 10!
$=10\times 9\times 8\times 7\times 6\times 5\times 4\times 3\times 2\times 1=3628800.$