As part of his workout jamal does 2 sets of 25 push ups. if he does this 10 times each month, how many push ups does he do each month ?

First determine how many push-ups he does each time 

2 sets × 25 pushups = 50 pushups

Now times that by the number of times he does this each month 

50 pushups × 10times a month = 500 pushups a month 

Ais the correct answer