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's speed with the current is 20 kmph and speed of the current is 3 kmph. The Man's speed against the current will be

Option A: 11 kmph

Option B: 12 kmph

Option C: 14 kmph

Option D: 17 kmph

Option E: None of these
[EX A]: Option C

[EX Q]: Question: A man ran 20 miles in 2 hours 2 minutes. What was the average speed of the man in miles per hour?

Option A: 9.72 miles / hour

Option B: 9.73 miles / hour

Option C: 9.75 miles / hour

Option D: 9.78 miles / hour

Option E: 9.79 miles / hour
[EX A]: Option D

[EX Q]: Question: If 75 percent of a class answered the first question on a certain test correctly, 70 percent answered the second question on the test correctly, and 20 percent answered neither of the questions correctly, what percent answered both correctly?

Option A: 10%

Option B: (8

Option C: 30%

Option D: 50%

Option E: 65%
[EX A]:
Option E