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The median of 10,15, x and y is 18. 5, and x < y. Column A Column B X 22
The median of 10,15, x and y is 18. 5, and x < y. Column A Column B X 22
admin
2009-05-19
22
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
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