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.

Question: A rectangular plot measuring 90 metres by 50 metres is to be enclosed by wire fencing. If the poles of the fence are kept 10 metres apart, how many poles will be needed ?

 Option A: 28

 Option B: 56

 Option C: 57

 Option D: 58

 Option E: None of these
Option A

Question: A committee of 5 people is to be selected from 7 people. How many different committees are possible?

 Option A: 21

 Option B: 40

 Option C: 56

 Option D: D.168

 Option E: 336
Option A

Question: A peanut farmer sells his peanuts through a distributor, which take a commission of 17% of the price set by the farmer. The distributor obtains the product from a farmer at the price of $15 per peanut pound. What is the price that the buyer observers if the distributor wants to maintain a 17% profit on the cost of each pound of peanuts sold?

 Option A: 21.15

 Option B: 21.2

 Option C: 21.25

 Option D: 21.3

 Option E: 21.35

Option A