TASK DEFINITION: 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.
PROBLEM: 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

SOLUTION: b

PROBLEM: Problem: the average of first five multiples of 7 is :
Options: a. 9, b. 16, c. 15, d. 8, e. 21

SOLUTION: e

PROBLEM: Problem: the length of a rectangular plot is thrice its width. if the area of the rectangular plot is 432 sq meters, then what is the width ( in meters ) of the rectangular plot ?
Options: ['a. 10', 'b. 11', 'c. 12', 'd. 13', 'e. 14']

SOLUTION:
c