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: solution y is 30 percent liquid x and 70 percent water. if 2 kilograms of water evaporate from 6 kilograms of solution y and 2 kilograms of solution y are added to the remaining 4 kilograms of liquid, what percent of this new solution is liquid x ?
Options: a. 33 %, b. 35 1 / 2 %, c. 37 %, d. 40 %, e. 42 %
[EX A]: d

[EX Q]: Problem: j is faster than p. j and p each walk 24 km. sum ofthe speeds of j and p is 7 kmph. sum of time taken by them is 14 hours. then j speed is equal to ?
Options: a. 4, b. 5, c. 6, d. 7, e. 8
[EX A]: a

[EX Q]: Problem: 3 men and 8 women complete a task in same time as 6 men and 2 women do. how much fraction of work will be finished in same time if 4 men and 2 women will do that task.
Options: a. 5 / 7, b. 3 / 10, c. 5 / 18, d. 5 / 16, e. 5 / 11
[EX A]:
a