Question

有一道GRE数学题不太明白，请教详细解法。

题干如下：House Prices               Number of Houses$100,000-$133,000                  12$134,000-$166,000                  25$167,000-$199,000                  8 The table show the distribution of prices of 45 houses for sale in a certain region. Select two of the following choices and place them in the blanks below so that the resulting statement is true.$175,000   $185,000   $190,000at most $42,000   at least $57,000If the highest price of the 45 houses is __________, then the range of the prices of the 45 houses is __________Clink on a choice, then click ona blank.

Answer 1

第一个空 $190,000，第二空at least $57,000
你肯定是题目意思没弄懂，很简单的
有12个房子在价格区间$100,000-$133,000，25个在$134,000-$166,000，8个在$167,000-$199,000
如果45个房子中，最高价是$190,000，则房价的range（范围，最高价-最低价）是最少$57,000

因为已知最高价是190,000且有房子在$100,000-$133,000这个区间 所以就算12个房子都是$133,000，则range也为190,000-133,000=57,000 为最小值