Question

Calculate the average (arithmetic mean) of the list of numbers shown in the table. (rounded to the nearest tenth)

A)
223.0
250.8
250.9
D)
286.7

Answer 1

D) 286.7 because the number is rounded to your nearest tenth

Answer 2

250.9

Explanation:

Find mean by adding all the terms and dividing by the number of terms.

173+299+181+103+540+81+270+360=2007

We divide by 8 since we are adding 8 different numbers.

2007/8 =250.875

We round this number. We want to round the 250.875 depending on the number that follow the 8. The number after 8 is 7, 250.875. Since seven is above five, the 8 will increase to a 9. So we have:

250.9