Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Problem: the average marks obtained by 50 candidates in a certain examination is 40. find the total marks.
Options: a. 1800, b. 2000, c. 1640, d. 2200, e. 2400
Student:
b