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: a bag contains 10 red jellybeans and 10 blue jellybeans. if 3 jellybeans are removed one at a time, at random and are not replaced, what is the probability e that all 3 jellybeans removed from the bag are blue ?
Options: a. 9 / 100, b. 2 / 19, c. 1 / 8, d. 3 / 20, e. 3 / 10
[EX A]: b

[EX Q]: Problem: water is leaking out from a cylinder container at the rate of 0.31 m ^ 3 per minute. after 10 minutes, the water level decreases 1 / 9 meters. what is value of the radius in meters ?
Options: a. 2, b. 3, c. 4, d. 6, e. 9
[EX A]: b

[EX Q]: Problem: in country z, 12 % of the people do not have a university diploma but have the job of their choice, and 25 % of the people who do not have the job of their choice have a university diploma. if 40 % of the people have the job of their choice, what percent of the people have a university diploma ?
Options: a. 35 %, b. 43 %, c. 55 %, d. 65 %, e. 75 %
[EX A]:
b