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: in an office, totally there are 2800 employees and 25 % of the total employees are males. 30 % of the males in the office are at - least 50 years old. find the number of males aged below 50 years ?
Options: a. 390, b. 490, c. 400, d. 460, e. none of these
[A]: b


[Q]: Problem: in a certain deck of cards, each card has a positive integer written on it, in a multiplication game a child draws a card and multiplies the integer on the card with the next large integer. if the each possible product is between 35 and 200, then the least and greatest integer on the card would be
Options: a. 3 and 15, b. 3 and 20, c. 4 and 13, d. 4 and 14, e. 5 and 14
[A]: e


[Q]: Problem: raman, lakshmi and muthu enter into partnership. raman invests some money at the beginning, lakshmi invests double the amount after 6 months, and muthu invests thrice the amount after 8 months. if the annual gain be rs. 36000. lakshmi ' s share is ?
Options: a. 12000, b. 14000, c. 8000, d. 5000, e. 3000
[A]:
a