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: A man performs 3/5 of the total journey by rail, 17/20 by bus and the remaining 6.5 km on foot. His total journey is :

 Option A: 125 km

 Option B: 130 km

 Option C: 135 km

 Option D: 140 km

 Option E: None
[EX A]: Option B

[EX Q]: Question: If a college has 15 staff for every 700 students, then what is the number of staff for 1400 students?

 Option A: 30

 Option B: 14

 Option C: 12

 Option D: 17

 Option E: 19
[EX A]: Option A

[EX Q]: Question: Scott's average (arithmetic mean) golf score on his first four rounds was 58.What score does he need on his fifth round to drop his average score by 2 points?

 Option A: 48

 Option B: 72

 Option C: 78

 Option D: 88

 Option E: 312
[EX A]:
Option A