Question

A group of n boys can be arranged in a line in a certain number of ways. By adding two more boys to the

group, the number of possible arrangements increases by a factor of 420. Find the value of n?​

Answer 1

Answer:

A group of n boys can be arranged in a line in a certain number of ways. By adding two more boys to the

group, the number of possible arrangements increases by a factor of 420. Find the value of n?