In 1990 a total of s earthquakes occurred worldwide, some but not all of which occurred in Asia. If t o f 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?	Choose the correct choice from the following answers:
A) s/t	B) t/s	C) t/(s-t)	D) s/(s-t)	E) 1- (t/s)
We're given a couple of facts to work with:   1) There were a total of s earthquakes   2) Of those earthquakes, t of them occurred in Asia   We're asked for the ratio of the number of earthquakes that occurred IN ASIA to the number of earthquakes that DID NOT occur in Asia.   Let's TEST VALUES   s = 5 total earthquakes   t = 2 occurred in Asia   Thus, there were 3 earthquakes that DID NOT occur in Asia....   The answer to the question is 2:3   We just need to plug in the values for s and t and find the match...   Answer A: s/t = 5/2 NOT a match   Answer B: t/s = 2/5 NOT a match   Answer t/(s-t): t/(s-t) = 2/(5-2) = 2/3 This IS a match   Answer D: s/(s-t) = 5/(5-2) = 5/3 NOT a match   Answer E: 1 - (t/s) = 1-2/5 = 3/5 NOT a match   t/(s-t)
<result>C</result>
In 1990 a total of s earthquakes occurred worldwide, some but not all of which occurred in Asia. If t o f 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?