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.

Problem: a, b, c, d, e are the 5 electronic shops in the naza market, which have 20, 30, 60, 80 and 50 t. v. sets with them respectively, then the average number of t. v. sets in each shop is
Options: a. 24, b. 48, c. 50, d. 60, e. none
b