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: pipe a can fill a tank in 6 hours . due to a leak at the bottom , it takes 10 hours for the pipe a to fill the tank . in what time can the leak alone empty the full tank ?
[A]: 15


[Q]: Problem: of the diplomats who attended a summit conference : 20 spoke japanese , 32 did not speak russian and 20 % of the diplomats spoke neither japanese nor russian . if 10 % of the diplomats spoke both japanese and russian , then how many diplomats attended the conference ?
[A]:
120