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.

[Q]: Question: A bag is filled with pennies and nickels in the ratio of 5 to 3. There are 30 nickles in the bag, how many coins are there in that bag?

Option A: 70

Option B: 65

Option C: 75

Option D: 85

Option E: 80
[A]: Option E

[Q]: Question: A circular swimming pool is surrounded by a concrete wall 4 feet wide.if the area of the wall is 11/25 of the area of the pool, then the radius of the pool in feet is?

Option A: 22

Option B: 20

Option C: 9

Option D: 8

Option E: 1
[A]: Option B

[Q]: Question: A man buys two articles for Rs.1980 each and he gains 10% on the first and loses 10% on the next. Find his total gain or loss percent?

Option A: 9%loss

Option B: 3%loss

Option C: 5%loss

Option D: 7%loss

Option E: 2%loss
[A]:
Option A