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: in a mayoral election, candidate x received 1 / 2 more votes than candidate y, and candidate y received 2 / 5 fewer votes than z. if z received 25000 votes how many votes did candidate x received ?
Options: a. 18000, b. 22500, c. 24000, d. 26000, e. 32000
[A]: b

[Q]: Problem: what is the sum of natural numbers between 30 and 100
Options: a. 4615, b. 4860, c. 5000, d. 5500, e. 5550
[A]: a

[Q]: Problem: suraj has a certain average of runs for 16 innings. in the 17 th innings he scores 92 runs thereby increasing his average by 4 runs. what is his average after the 17 th innings ?
Options: a. 48, b. 64, c. 28, d. 72, e. 27
[A]:
c