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.

Q: Problem: if the radius of a cylinder is made 3 times and so is the height, what is the new volume of the cylinder divided by the old one ?
Options: a. 27., b. 2., c. 6., d. 4., e. 10.

A: a
****
Q: Problem: ramesh purchased a refrigerator for rs. 12500 after getting a discount of 20 % on the labelled price. he spent rs. 125 on transport and rs. 250 on installation. at what price should it be sold so that the profit earned would be 18 % if no discount was offered ?
Options: a. 17608, b. 17606, c. 17604, d. 17600, e. 18880

A: e
****
Q: Problem: in 2 bags, there are to be put together 5 red and 12 white balls, neither bag being empty. how must the balls be divided so as to give a person who draws 1 ball from either bag - the least chance of drawing a red ball ?
Options: a. 1 / 32, b. 2 / 32, c. 3 / 32, d. 4 / 32, e. 5 / 32

A:
e
****