TASK DEFINITION: You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
PROBLEM: Question: A boy and a girl appear for an interview against 2 vacant posts in an office. The probability of the boy's selection is 1/5 and that of the girl's selection is 1/3. What is the probability that only 1 of them is selected?

 Option A: 1/3

 Option B: 2/5

 Option C: 3/5

 Option D: 4/7

 Option E: 5/9

SOLUTION: Option B

PROBLEM: Question: A sum of Rs.4800 is invested at a compound interest for three years, the rate of interest being 10% p.a., 20% p.a. and 25% p.a. for the 1st, 2nd and the 3rd years respectively. Find the interest received at the end of the three years?

 Option A: Rs.3129

 Option B: Rs.3120

 Option C: Rs.3108

 Option D: Rs.3106

 Option E: Rs.3127

SOLUTION: Option B

PROBLEM: Question: Jill works as a waitress at the local diner where she earns an hourly wage of $10 per hour and a standard tip rate of 40% of the cost of the orders she serves. If she worked four 16-hour shifts this week and averaged $40 in orders per hour, how much did Jill earn this week?

 Option A: 280

 Option B: 300

 Option C: 1664

 Option D: 350

 Option E: 400

SOLUTION:
Option C