## Prealgebra (7th Edition)

45, 86, 21, 60, 86, 64, 45 To find the mean, sum the numbers and divide by the count of numbers. $mean=(45+86+21+60+86+64+45)\div7=407\div7=58.14$ The median is the number in the center when the numbers are written in order. Order the numbers from smallest to largest. $21, 45, 45, \underline{60}, 64, 86, 86$ 60 is in the center so is the median. Both 45 and 86 appear twice, so the list has two modes.