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.
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Question: Question: In a certain school, the ratio of boys to girls is 5 to 13. If there are 160 more girls than boys, how many boys are there?

Option A: 100

Option B: 36

Option C: 45

Option D: 72

Option E: 117

Answer: Option A

Question: Question: A patient was given five pills which he is required to take one after every twenty minutes.
How long can the pills run for him?

Option A: 1 hour

Option B: 1 hour 20 minutes

Option C: 1 hour 30 minutes

Option D: 1 hour 35 minutes

Option E: 1 hour 40 minutes

Answer: Option B

Question: Question: Four brothers Adam, Bill, Charles and David together contributed certain amount of money and purchased a car. The contribution made by Adam is half that of the total contribution made by the other three brothers, contribution made by Bill is one-fourth of the total contribution made by the other three brothers and the contribution made by Charles is two-third of the total contribution made by the other three brothers. If the total price of the car is $9750, find the contribution made by David.

Option A: $540

Option B: $580

Option C: $600

Option D: $650

Option E: $680

Answer:
Option D