What is the range?

Question

Aleksihairy wanted to purchase a used book. She found several books for sale with the following prices.

$7.04, $7.04, $7.05, $11.99, $12.50, $12.99, $9.98, $9.99, $8.51, $11.95

1. What is the mode?
2. What is the median? 
3. What is the mean? 
4. What is the range?

Answer 1

$7.04, $7.04, $7.05, $11.99, $12.50, $12.99, $9.98, $9.99, $8.51, $11.95

Mode: Number that shows up most often -- I see $7.04 twice, and everything else only once, so $7.04

Median: Number in the middle when you put the prices in order, smallest to largest

7.04, 7.04, 7.05, 9.51, 9.98, 9.99, 11.95, 11.99, 12.50, 12.99

Since there are two numbers in the middle -- 9.98 and 9.99 -- You add those together and divide by 2: $9.985

Mean: Average -- add all the numbers together and divide by how many there are

All added together is $100.04. Divide that by 10, you get $10.004

Range: Largest number minus smallest number

Biggest number is 12.99. Smallest is 7.04. 12.99-7.04 = $5.95