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: A student gets 60% in one subject, 80% in the other. To get an overall of 75% how much should get in third subject.

 Option A: 75%

 Option B: 25%

 Option C: 85%

 Option D: 55%

 Option E: 65%

Answer: Option C


Question: Question: A and B complete a work in 6 days. A alone can do it in 10 days. If both together can do the work in how many days?

 Option A: 3.75

 Option B: 3.76

 Option C: 3.79

 Option D: 3.74

 Option E: 3.71

Answer: Option A


Question: Question: Adam can do a job in 15days, John can do the same job in 20days. If they work together for 4days on this job. What fractionof job is incomplete ?

 Option A: 3/11

 Option B: 4/11

 Option C: 13/13

 Option D: 8/15

 Option E: 9/11

Answer:
Option D