Part 1. 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.
Part 2. Example
From a pack of 52 cards, two cards are drawn together at random. What is the probability of both the cards being kings?

Option A:2/1223

Option B: 1/122

Option C: 1/221

Option D: 3/1253

Option E: 2/153

Answer: Option C
Explanation: Let s be the sample space.
Then n(s) = 52C2 = 1326
E = event of getting 2 kings out of 4
n(E) = 4C2 = 6
P(E) = 6/1326 = 1/221
Part 3. Exercise
Question: In 1937, the ship of the great sailor SINBAD left an Egyptian port heading Ivory coast at E mile/month .
One month later another ship of the greatest pirate ever CHENG I SAO was 5000 miles due south of the same Egyptian port and heading due north at Y miles/month. Six months later after the leaving of Sinbad's ship from Egyptian port, how far apart were the ships? [Ivory coast is in the west of Egypt]

Option A: { (6E

Option B: { (36x

Option C: { (16x

Option D: { (7x

Option E: { (2x
Answer:
Option A