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 person incurs a loss of 5 % be selling a watch for rs. 1140. at what price should the watch be sold to earn 5 % profit
Options: a. rs. 1200, b. rs. 1230, c. rs. 1260, d. rs. 1290, e. none of these
[EX A]: c

[EX Q]: Problem: if 8 men or 12 women can do a piece of work in 30 days, in how many days can the same work be done by 6 men and 11 women ?
Options: a. 10 days, b. 11 days, c. 13 days, d. 15 days, e. 18 days
[EX A]: e

[EX Q]: Problem: a company pays 12.5 % dividend to its investors. if an investor buys rs. 60 shares and gets 25 % on investment, at what price did the investor buy the shares ?
Options: a. 25, b. 66, c. 30, d. 19, e. 01
[EX A]:
c