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.

[EX Q]: Problem: the average of first five multiples of 7 is :
Options: a. 9, b. 16, c. 15, d. 8, e. 21
[EX A]: e

[EX Q]: Problem: when 242 is divided by a certain divisor the remainder obtained is 15. when 698 is divided by the same divisor the remainder obtained is 27. however, when the sum of the two numbers 242 and 698 is divided by the divisor, the remainder obtained is 5. what is the value of the divisor ?
Options: a. 11, b. 17, c. 13, d. 23, e. 37
[EX A]: e

[EX Q]: Problem: in a certain corporation, there are 300 male employees and 150 female employees. it is known that 30 % of the male employees have advanced degrees and 40 % of the females have advanced degrees. if one of the 450 employees is chosen at random, what is the probability this employee has an advanced degree or is female ?
Options: a. 2 / 3, b. 3 / 5, c. 3 / 10, d. 8 / 15, e. 11 / 30
[EX A]:
d