The median of 10,15, x and y is 18. 5, and x < y. Column A Column B X 22

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问题 The median of 10,15, x and y is 18. 5, and x < y.

Column A                  Column B
X                         22

选项 A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given

答案C

解析 10,15,x和y的中数(median)是18.5,并且x解:本题的正确答案为(C)。由中数是18.5,且x15,否则将无法得到四个数的中数等于18.5这个已知条件,所以有:(15+x)/2=18.5   so, x=22
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