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 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

A: a
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Q: Problem: there are 15 boys and 10 girls in a class. if three students are selected at random, in how many ways that 1 girl or 2 boys are selected ?
Options: a. 100, b. 105, c. 115, d. 120, e. 125

A: c
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Q: Problem: in an examination it is necessary for a candidate to get 45 % of the maximum marks to pass. a candidate who gets 180 marks, fails by 45 marks. find the maximum marks.
Options: a. 450, b. 600, c. 500, d. 550, e. 650

A:
c
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