Answer:
The range is 9.
Explanation:
The range of a data set is the difference between the maximum and the minimum values.
Let's begin by putting the set of values in order from lowest to highest.
12, 14, 15, 16, 17, 17, 21
The lowest value is 12, and the highest value is 21.
Let's subtract the minimum value from the maximum value to determine the range:
21 - 12 = 9
Hope this helps :)