TASK DEFINITION: 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.
PROBLEM: Question: A boat takes 19 hours for travelling downstream from point A to point B and coming back to a point C midway between A and B. If the velocity of the stream is 4 kmph and the speed of the boat in still water is 14 kmph, what is the distance between A and B ?

 Option A: 160 km

 Option B: 180 km

 Option C: 200 km

 Option D: 220 km

 Option E: None

SOLUTION: Option B

PROBLEM: Question: An article is bought for Rs.675 and sold for Rs.1215, find the gain percent?

 Option A: 33 1/9%

 Option B: 33 8/3%

 Option C: 33 1/3%

 Option D: 33 2/3%

 Option E: 80%

SOLUTION: Option E

PROBLEM: Question: In an election only two candidates contested. A candidate secured 70% of the valid votes and won by a majority of 192 votes. Find the total number of valid votes?

 Option A: 430

 Option B: 438

 Option C: 436

 Option D: 480

 Option E: 422

SOLUTION:
Option D