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

[EX Q]: Problem: a sum was put at simple interest at a certain rate for 10 years . had it been put at 5 % higher rate , it would have fetched rs . 600 more . what was the sum ?
[EX A]: rs . 1200

[EX Q]: Problem: a group of students decided to collect as many paise from each member of group as is the number of members . if the total collection amounts to rs . 46.24 , the number of the member is the group is :
[EX A]: 68

[EX Q]: Problem: in 10 years , a will be twice as old as b was 10 years ago . if a is now 7 years older than b the present age of b is
[EX A]:
37