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: An amount of Rs. 75000 is invested in two types of shares. The first yields an interest of 9% p.a and the second, 11% p.a. If the total interest at the end of one year is 9 3/4 %, then the amount invested in each share was?

Option A: s. 46875; Rs. 28125

Option B: s. 62500; Rs. 37500

Option C: s. 72500; Rs. 27500

Option D: s. 82500; Rs. 17500

Option E: s. 72500; Rs. 17500
[EX A]: Option A

[EX Q]: Question: The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 kms in 4 hours, then the speed of the first train is:

Option A: 70 km/hr

Option B: 75 km/hr

Option C: 84 km/hr

Option D: 87.5 km/hr

Option E: 88.5 km/hr
[EX A]: Option D

[EX Q]: Question: The sum of two numbers is 40 and their product is 300. What will be the sum of their reciprocals?

Option A: 1/40

Option B: 8/75

Option C: 75/4

Option D: 2/15

Option E: 75/6
[EX A]:
Option D