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.
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Question: 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

Answer: e


Question: Problem: two trains of equal are running on parallel lines in the same direction at 45 km / hr and 36 km / hr. the faster train passes the slower train in 36 sec. the length of each train is ?
Options: a. 45, b. 88, c. 66, d. 55, e. 22

Answer: a


Question: Problem: a cube has five of its faces painted half red and half white. the other face is completely painted white. what is the ratio between the red painted areas and the white painted areas of the cube ?
Options: ['a. 6: 11', 'b. 2: 5', 'c. 3: 4', 'd. 5: 7', 'e. 2: 3']

Answer:
d