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: the price of a book is increased from $ 300 to $ 390. what is the % of increase in its price ?
Options: a. 10 %, b. 20 %, c. 30 %, d. 35 %, e. 45 %

SOLUTION: c

PROBLEM: 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.
Options: a. 20, b. 11, c. 12, d. 13, e. 14

SOLUTION: a

PROBLEM: Problem: sravan travelled for 15 hours. he covered the first half of the distance at 45 kmph and remaining half of the distance at 30 kmph. find the distance travelled by sravan ?
Options: a. 520, b. 540, c. 550, d. 560, e. 440

SOLUTION:
b