GWD25-35

[amanikang]

Linda purchased 3 books at a book fair.what was the median price of the 3 books?
1. the average(arithmetic mean)price of the 3 books was $1.5
2. the price of one of the 3 books was $1.5

答案: C

我選B??

[whoops]

Linda purchased 3 books at a book fair.what was the median price of the 3 books?
1. the average(arithmetic mean)price of the 3 books was $1.5
2. the price of one of the 3 books was $1.5

答案: C

我選B??

條件1可得total=$4.5
條件2是說三本其中一本的價錢是$1.5

條件1+條件2
另兩本的total是4.5-1.5=3
if三本價錢相同,median是$1.5
if三本不同,還是可以得到median是$1.5