In order to find the range we first have to list the numbers from least to greatest:
16, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 21, 21, 22, 22, 24, 25, 25
range = largest value - smallest value = answer
range = 25 - 16 = 9
range = 19
so, our final answer would be 19.
~ i hope this helps you have a good day/night afternoon~ ~-gabby~