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: On flipping 3 coins together what is the outcomes for at least four tail?

Option A: 1/7

Option B: 0

Option C: 1

Option D: 4/13

Option E: 5/13
[EX A]: Option B

[EX Q]: Question: A cow and horse are bought for Rs.2,00,000. The cow is sold at a profit of 20% and the horse is sold a t a loss of 10%. The overall gain is Rs.4000, the Cost price of cow?

Option A: 2 percent

Option B: 3

Option C: 4

Option D: 5

Option E: 6
[EX A]: Option A

[EX Q]: Question: A baseball card decreased in value 40% in its first year and 10% in its second year. What was the total percent decrease of the card's value over the two years?

Option A: 28%

Option B: 30%

Option C: 32%

Option D: 46%

Option E: 72%
[EX A]:
Option D