Hello!
Let's review what mean and range is.
REVIEW
Mean is calculated by adding all the numbers and dividing by how many numbers there are.
Range is calculated by subtracting the lowest number from the greatest number, also known as finding the difference
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Mean
18 + 23 + 10 + 39 + 22 + 17 + 16 + 15 = 160
There are 8 numbers.
Divide 160 by 8 to get the mean
160 ÷ 8 = 20
The mean is 20
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Range
The highest number is 39, while the lowest number is 10. Subtract 10 from 39 to get the range.
39 - 10 = 29
The range is 29
Your answer is the 2nd option.
I hope you find this useful! :)