The task is to generate the correct answer for a given math problem.

[Q]: Problem: a man have 8 t - shirt and some pant . he can dress in 72 ways . then tell me the no . of pant that man have .
[A]: 9


[Q]: Problem: if each participant of a chess tournament plays exactly one game with each of the remaining participants , then 153 games will be played during the tournament . find the number of participants .
[A]: 18


[Q]: Problem: at what rate percent on simple interest will rs . 750 amount to rs . 900 in 5 years ?
[A]:
4