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.

Input: Consider Input: Question: A committee of 5 people is to be selected from 7 people. How many different committees are possible?

Option A: 21

Option B: 40

Option C: 56

Option D: D.168

Option E: 336

Output: Option A

Input: Consider Input: Question: The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 9 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team?

Option A: 23 years

Option B: 24 years

Option C: 25 years

Option D: 26 years

Option E: 27 years

Output: Option D

Input: Consider Input: Question: A bullet train covers a distance in 50 min, if it runs at a speed of 48kmph on an average. The speed at which the bullet train must run to reduce the time of journey to 40min will be.

Option A: 80 kmph

Option B: 40 kmph

Option C: 60 kmph

Option D: 90 kmph

Option E: 30 kmph
Output: Option C