找考题网-背景图
未分类题

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

A.Column
B.if
C.if
D.if
E.if

【参考答案】

C
解析:10,15,x和y的中数(median)是18.5,并且x<y。
解:本题的正确答案为(C)。由中数是18.5,且x<y,可以推出x>15,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
热门试题