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: Rs.8000 become Rs.11256 in a certain interval of time at the rate of 5% per annum of C.I. Find the time?

 Option A: 6 YEARS

 Option B: 7

 Option C: 5

 Option D: 3

 Option E: 4
[A]: Option B


[Q]: Question: A cistern can be filled by a tap in 3 hours while it can be emptied by another tap in 9 hours. If both the taps are opened simultaneously, then after how much time will the cistern get filled?

 Option A: 2.9 hrs

 Option B: 4.5 hrs

 Option C: 2.9 hrs

 Option D: 7.2 hrs

 Option E: 8.6 hrs
[A]: Option B


[Q]: Question: Three grades of milk are 1 percent, 2.7 percent and 3 percent fat by volume. If x gallons of the 1 percent grade, y gallons of the 2.7 percent grade, and z gallons of the 3 percent grade are mixed to give x+y+z gallons of a 2.5 percent grade, what is x in terms of y and z?

 Option A: y + 3z

 Option B: (y +z

 Option C: 2y + 5z

 Option D: 3y + z

 Option E: 3y + 4.5z
[A]:
Option C