gmat数学疑问1、 in city x last April,was the average(arithmetic mean) daily high temperature greater than the median daily high temperature?(1) in city x last April,the sum of the 30 daily high temperature was 2,160°(2) in city x last April,60%

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gmat数学疑问1、 in city x last April,was the average(arithmetic mean) daily high temperature greater than the median daily high temperature?(1) in city x last April,the sum of the 30 daily high temperature was 2,160°(2) in city x last April,60%
gmat数学疑问
1、 in city x last April,was the average(arithmetic mean) daily high temperature greater than the median daily high temperature?
(1) in city x last April,the sum of the 30 daily high temperature was 2,160°
(2) in city x last April,60% of the daily high temperature were less than the average daily high temperature.
题目中的60%没有说是最前面那几天啊?有可能是前九天和九天,那怎么可以估计到中位数呢?

gmat数学疑问1、 in city x last April,was the average(arithmetic mean) daily high temperature greater than the median daily high temperature?(1) in city x last April,the sum of the 30 daily high temperature was 2,160°(2) in city x last April,60%
中位数按数字大小排序,和天数顺序无关.所以2就可以了.

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这题你是不是理不顺啊？ 我来给你详细推理一下。
设a为平均值，m为中位数。
根据题意：30天中60%的温度低于a，意思是一个月中有18天温度低于a，设这18天从大到小依次为X1，X2，X3.....X18(所有Xi都小于a)。
不难发现，X1为所有30天中温度最低的温度，而X15和X16的平均值等于m。 所以m小于a...

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这题你是不是理不顺啊？ 我来给你详细推理一下。
设a为平均值，m为中位数。
根据题意：30天中60%的温度低于a，意思是一个月中有18天温度低于a，设这18天从大到小依次为X1，X2，X3.....X18(所有Xi都小于a)。
不难发现，X1为所有30天中温度最低的温度，而X15和X16的平均值等于m。 所以m小于a

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gmat数学疑问1、 in city x last April,was the average(arithmetic mean) daily high temperature greater than the median daily high temperature?(1) in city x last April,the sum of the 30 daily high temperature was 2,160°(2) in city x last April,60% 请高手翻译两道gmat数学题并求解1、 in city x last April, was the average(arithmetic mean) daily high temperature greater than the median daily high temperature?(1) in city x last April, the sum of the 30 daily high temperature was 2,160 一道GMAT OG上的数学题Of the 230 single-family homes built in City X last year,how many were occupied at the end of the year?(1)Of all single-family homes in City X,90 percent were occupied at the end of last year.(2)A total of 7200 single-fami there are tall buildings in the city?改疑问 GMAT数学如何准备?怎么在1个月内提高GMAT数学的分数呢 Gmat数学,求解! GMAT数学还难啊? Gmat数学难度 gmat数学ds GMAT数学难吗? gmat数学考什么 gmat数学50分, GMAT数学满分是多少 GMAT数学满分是多少 GMAT 一道数学DS题X的（X+Y)^2次方等于多少?（1）XY=6(2)X+Y=5 GMAT的数学怎么准备 GMAT数学要怎么复习? GMAT数学需要复习多久