Detailed Instructions: 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:Problem: if the average of 20 digits is 500 and the average of 14 of them is 390, calculate the average of the remaining 6 numbers ?
Options: a. 756.7, b. 751.7, c. 753.7, d. 752.7, e. 722.7
Solution:
a