TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: p , q and r together earn rs . 1710 in 9 days . p and r can earn rs . 600 in 5 days . q and r in 7 days can earn rs . 910 . how much amount does r can earn per day ?

SOLUTION: s . 60

PROBLEM: Problem: a 9 % stock yields 8 % . the market value of the stock is :

SOLUTION: rs . 112.50

PROBLEM: Problem: tourist purchased a total of 30 travelers checks in $ 50 and $ 100 denominations . the total worth of the travelers checks is $ 1800 . how many checks of $ 50 denominations can he spend so that average amount ( arithmetic mean ) of the remaining travelers checks is $ 100 ?

SOLUTION:
2