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: what is the least number of squares tiles required to pave the floor of a room 15.17 m long and 9.02 m broad ?
Options: ['a. 814', 'b. 266', 'c. 287', 'd. 999', 'e. 661']

SOLUTION: a

PROBLEM: Problem: in what time will a train 120 m long cross an electric pole, it its speed be 121 km / hr ?
Options: a. 2.5, b. 2.7, c. 2.9, d. 3.6, e. 2.1

SOLUTION: d

PROBLEM: Problem: in my, xiang sold 15 used cars. for these 15 used cars the range of selling prices was 15000 and the lowest selling price was 4500. in june, xiang sold 10 cars. for these 10 cars the range of selling was 16000 and the lowest selling price was 5000. what was the range of selling prices for the 25 used car sold by xiang in may and june ?
Options: a. 15,600, b. 15,750, c. 16,820, d. 18,100, e. 19,200

SOLUTION:
c