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.

Q: Problem: the total marks obtained by a student in mathematics and physics is 50 and his score in chemistry is 20 marks more than that in physics. find the average marks scored in mathamatics and chemistry together.
Options: a. 15, b. 25, c. 35, d. 45, e. 55

A: c
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Q: Problem: what least number must be subtracted from 13294 so that the remainder is exactly divisible by 97 ?
Options: a. 3, b. 5, c. 7, d. 9, e. 10

A: b
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Q: Problem: the owner of a furniture shop charges his customer 60 % more than the cost price. if a customer paid rs. 2000 for a computer table, then what was the cost price of the computer table ?
Options: a. 2789, b. 2772, c. 1250, d. 6725, e. 2099

A:
c
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