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: mrs. evans gave a test to her freshmen economics class, which has 29 students enrolled and 19 of them answered question 1 correctly. if 24 answered question 2 correctly and 5 did not take the test then how many answered both questions correctly ?
Options: a. 3, b. 9, c. 11, d. 17, e. 19
[EX A]: e

[EX Q]: Problem: 40 is subtracted from 60 % of a number, the result is 50. find the number ?
Options: a. 150, b. 330, c. 277, d. 279, e. 712
[EX A]: a

[EX Q]: Problem: the average salary of 20 people in the shipping department at a certain firm is $ 1000. the salary of 10 of the employees is $ 600 each and the salary of 6 of the employees is $ 200 each. what is the average salary of the remaining employees ?
Options: a. $ 2500, b. $ 3200, c. $ 4500, d. $ 5000, e. $ 5200
[EX A]:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
b

