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

[Q]: Problem: 30 pens and 75 pencils were purchased for 750 . if the average price of a pencil was 2.00 , find the average price of a pen .
[A]: 20


[Q]: Problem: if the average of 5 x and 8 y is greater than 90 , and x is twice y , what is the least integer value of x ?
[A]: 4


[Q]: Problem: a sum of money at simple interest amounts to rs . 720 after 2 years and to rs . 1020 after a further period of 5 years . the sum is :
[A]:
600