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: There are 3 questions in a question paper. If the questions have 4,3 and 2 solutions respectively, find the total number of solutions

 Option A: 24

 Option B: 25

 Option C: 30

 Option D: 40

 Option E: 54
[EX A]: Option A

[EX Q]: Question: In a local school district, the high school and middle school each received r dollars toward funding for the student arts program. The high school enrolled 600 students and the middle school enrolled 300 students. Later, the middle school transferred s dollars to the high school so that they would have received the same funding per student. Which of the following is equivalent to s?

 Option A: r/3

 Option B: r/2

 Option C: 2r

 Option D: 3r

 Option E: r/9
[EX A]: Option A

[EX Q]: Question: in a powder mix two varieties of powders costing Rs. 15 and Rs. 20 per kg respectively so as toget a mixture worth Rs. 16.50 kg?

 Option A: 1:3

 Option B: 2:5

 Option C: 7 : 3

 Option D: 7:5

 Option E: 5:8
[EX A]:
Option C