TASK DEFINITION: Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
PROBLEM: Problem: how many quarters are equal to 7 dollars ?
Options: a. 1, b. 28, c. 12, d. 9, e. 7

SOLUTION: b

PROBLEM: Problem: the average age of 15 students of a class is 15 years. out of these, the average age of 8 students is 14 years and that of the other 6 students is 16 years, the age of the 15 th student is
Options: a. 17, b. 12, c. 13, d. 14, e. 15

SOLUTION: a

PROBLEM: Problem: if a - b = 8 and a ^ 2 + b ^ 2 = 164, find the value of ab
Options: a. 10, b. 12, c. 50, d. 18, e. 19

SOLUTION:
c