TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: sachin is older than rahul by 7 years . if the ratio of their ages is 11 : 9 , find the age of sachin

SOLUTION: 38.5

PROBLEM: Problem: a sum of money at simple interest amounts to rs . 815 in 3 years and to rs . 878 in 4 years . the sum is :

SOLUTION: 626

PROBLEM: Problem: there are 28 balls which are red , blue or green . if 12 balls are green and the sum of red balls and green balls is less than 24 , at most how many red balls are there ?

SOLUTION:
11