The sum of 7 numbers is greater than 140 and less than 210. Which of the following could be the average (arithmetic mean) of the numbers?
26
20
30
34
Detailed Explanation
The formula for the average of a set of numbers is the sum of the numbers divided by the number of terms.
Avg = 140 ÷ 7
Avg = 20
Avg = 210 ÷ 7
Avg = 30
Therefore, the average must be between 20 and 30.
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