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.

[EX Q]: Question: If one-third of one-fourth of a number is 15, then three-tenth of that number is

 Option A: 35

 Option B: 36

 Option C: 45

 Option D: 54

 Option E: 57
[EX A]: Option D

[EX Q]: Question: A 300 m long train crosses a platform in 33 sec while it crosses a signal pole in 18 sec. What is the length of the platform?

 Option A: 286 m

 Option B: 250 m

 Option C: 277 m

 Option D: 278 m

 Option E: 267 m
[EX A]: Option B

[EX Q]: Question: Cost of an item is Rs 12.60 & profit is 10% over selling price what is the selling price

 Option A: 12.86

 Option B: 13.86

 Option C: 14.86

 Option D: 15.86

 Option E: 16.86
[EX A]:
Option B