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: one side of a rectangular field is 14 m and one of its diagonal is 17 m. find the area of the field.
Options: a. 134.4, b. 120, c. 150, d. 180, e. none

SOLUTION: a

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 age of a class of 20 students is 18 years. the average increased by 2 when the teacher ' s age also included. what is the age of the teacher ?
Options: a. 40 years, b. 41 years, c. 42 years, d. 43 years, e. 44 years

SOLUTION:
a