word problem

vladmire wrote:in may, xiang sold 15 used cars. for these 15 cars the range of the selling prices was 15000 and the lowest selling price was 4500. in june xiang sold 10 used cars. for these 10 cars, the range of the selling prices was 16500 and the lowest selling price was 6100. what was the range of the selling prices of the 25 used cars sold by xiang in May and June?

a)15,600
b)15,750
c)16,820
d)18,100
e)19,200

rohangupta83 wrote:Range in May

4500 to 19500

Range in June

6100 to 22600

Net Range for the 2 months (or 25 cars sold in this period)

22600 - 4500 = 18100

somail wrote:

rohangupta83 wrote:Range in May

4500 to 19500

Range in June

6100 to 22600

Net Range for the 2 months (or 25 cars sold in this period)

22600 - 4500 = 18100

Can someone explain this further. I can't get the reasoning behind this.

The Max these values are $16,500 and $15,000. Why are you adding the cheapest car of 4,500 and 6,100.

Range is max - min. The max sale value for $16,500 and min was $4,500. So isn't the range $12,000