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 shopkeeper sale, all of the prices of the items sold were different. if the price of a radio sold at the shopkeeper sale was both the 9 th highest price and the 14 th lowest price among the prices of the items sold, how many items were sold at the shopkeeper sale ?
Options: a. 23, b. 22, c. 32, d. 26, e. 17
[EX A]: b

[EX Q]: Problem: a batsman makes a score of 87 runs in the 17 th inning and thus increases his average by 3. find his average after 17 th inning.
Options: a. 39, b. 88, c. 26, d. 87, e. 11
[EX A]: a

[EX Q]: Problem: in an examination, 30 % of total students failed in hindi, 42 % failed in english and 28 % in both. the percentage of these who passed in both the subjects is :
Options: a. 23, b. 37, c. 56, d. 40, e. 81
[EX A]:
c