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: The least number of complete years in which a sum of money put out at 20% C.I. will be more than doubled is?

 Option A: 3

 Option B: 4

 Option C: 9

 Option D: 3

 Option E: 5
[EX A]: Option B

[EX Q]: Question: Simran started a software business by investing Rs. 50,000. After six months, Nanda joined her with a capital of Rs. 80,000. After 3 years, they earned a profit of Rs. 24,500. What was Simran's share in the profit?

 Option A: 2777

 Option B: 2999

 Option C: 2799

 Option D: 2781

 Option E: 10500
[EX A]: Option E

[EX Q]: Question: A sum of money is borrowed and paid back in two annual installments of Rs.882 each allowing 5% compound interest. The sum borrowed was :

 Option A: Rs.1620

 Option B: Rs. 1640

 Option C: Rs.1680

 Option D: Rs.1700

 Option E: Rs.1800
[EX A]:
Option B