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: On an order of 5 dozen boxes of a consumer product, a retailer receives an extra dozen free. This is equivalent to allowing him a discount of:

 Option A: 15%

 Option B: 16 1/6%

 Option C: 16 2/3%

 Option D: 20%

 Option E: 30%
[A]: Option C


[Q]: Question: If k is an integer and 2 < k < 7, for how many different values of k is there a triangle with sides of lengths 2, 6, and k?

 Option A: one

 Option B: two

 Option C: three

 Option D: four

 Option E: five
[A]: Option B


[Q]: Question: The mean of 50 observations was 36. It was found later that an observation 28 was wrongly taken as 23. The corrected new mean is :

 Option A: 36.0

 Option B: 36.5

 Option C: 36.1

 Option D: 36.2

 Option E: 36.8
[A]:
Option C