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 six-character password consists of three letter of the alphabet and three different digits between 0 and 9, inclusive. The letter must appear as the second or third character of the password. How many different passwords are possible?

Option A: 5,040

Option B: 2,228,720

Option C: 22,226,000

Option D: 22,237,440

Option E: 22,464,000
[EX A]: Option E

[EX Q]: Question: There are some pigeons and hares in a zoo. If heads are counted, there are 120. If legs are counted, there are 580. The number of hares in the zoo is?

Option A: 20

Option B: 82

Option C: 190

Option D: 137

Option E: 170
[EX A]: Option E

[EX Q]: Question: A reduction of 20% in the price of salt enables a lady to obtain 10kgs more for Rs.100, find the original price per kg?

Option A: Rs.3.2

Option B: Rs.2.9

Option C: Rs.2.5

Option D: Rs.5.2

Option E: Rs.2.1
[EX A]:
Option C