prep一道输血答案疑问，后天考试，求NN救命

markswim

In May, A sold 15 used cars. For these 15 used cars, the range of the selling prices was $15,000 and the lowest selling price was $4,500. In June, A sold 10 used cars. For these 10 used cars, the range of the selling prices was $16,500 and the lowest selling price was $6,100. What was the range of the selling price of the 25 used cars sold by A in May and June? (key: 15,600)

感觉答案错了，可这是prep，不确定

rectina1011

我也遇到过~答案确实是18100~

咩咩专属妖精

the range of the selling prices was $15,000  这句话是指  最高减最低。
所以，5月的时候，最低是4500，最高减最低是15000，所以最高是19500.
6月同理，最低是6100，最高减最低是16500，所以最高时22600
之后按楼上的说法做就好了！

forevergter

我怎么没遇到这个题。。。 不是18100？

iNobody

我算的，讨论一下

5月 最低4500，最高19500
6月 最低6100 最高22600
两月合起来 最低4500 最高22600 Range=最高-最低=22600-4500=18100

我也快考了 一起加油！