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.

Q: Question: A car dealership has 40 cars on the lot, 30% of which are silver. If the dealership receives a new shipment of 80 cars, 40% of which are not silver, what percentage of total number of cars are silver?

 Option A: 35%

 Option B: 37.5%

 Option C: 45%

 Option D: 47.5%

 Option E: 50%

A: Option E
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Q: Question: In what time will a railway train 90 m long moving at the rate of 44 kmph pass a telegraph post on its way?

 Option A: 3

 Option B: 5

 Option C: 4.3

 Option D: 6.5

 Option E: 7.4

A: Option E
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Q: Question: In 1990 a total of j earthquakes occurred worldwide, some but not all of which occurred in Asia. If c of these earthquakes occurred in Asia, which of the following represents the ratio of the number of earthquakes that occurred in Asia to the number that did NOT occur in Asia?

 Option A: j/c

 Option B: c/j

 Option C: c/(j-c

 Option D: j/(j-c

 Option E: 1- (c/j

A:
Option C
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