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: During the break of a football match, the coach will make 3 substitutions. If the team consists of 14 players among which there are 2 forwards, what is the probability that none of the forwards will be substituted?

 Option A:  21/55

 Option B:  18/44

 Option C:  21/99

 Option D:  28/44

 Option E:  36/55
[EX A]: Option C

[EX Q]: Question: In a school 50% of the students are younger than 10, 1/20 are 10 years old and 1/10 are older than 10 but younger than 12, the remaining 70 students are 12 years or older. How many students are 10 years old?

 Option A: 5

 Option B: 6

 Option C: 7

 Option D: 8

 Option E: 10
[EX A]: Option E

[EX Q]: Question: A sum of money becomes 7/6 of itself in 3 years at a certain rate of simple interest. The rate per annum is?

 Option A: 5 5/9 %

 Option B: 5 5/6 %

 Option C: 5 8/9 %

 Option D: 1 5/9 %

 Option E: 5 3/9 %
[EX A]:
Option A