If x is the median of the set {9/2, 10/3, 27/9, 21/5, x}, x could be Choose one
A) 16 / 5
B) 17 / 5
C) 28 / 7
D) 30 / 7
E) 31 / 7

Rationale: "the median is the middle number once all the numbers are arranged in increasing / decreasing order . we see that 10 / 3 = 3 . something , 27 / 9 = 3 . something 21 / 5 = 4 . something 9 / 2 = 4 . something so x should greater than the smallest two numbers and smaller than the greatest two numbers . we can see that x = 4 is possible . ( first look at the simplest option or the middle option since options are usually arranged in increasing / decreasing order ) answer ( c )"
Answer: C