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

[EX Q]: Problem: arjun started a business with rs . 20,000 and is joined afterwards by anoop with rs . 80 , 000 . after how many months did anoop join if the profits at the end of the year are divided equally ?
[EX A]: 9

[EX Q]: Problem: working together , wayne and his son can shovel the entire driveway in three hours . if wayne can shovel six times as fast as his son can , how many hours would it take for his son to shovel the entire driveway on his own ?
[EX A]: 7

[EX Q]: Problem: 3 / 4 of a number is 19 less than the original number . the number is ?
[EX A]:
76