Irandomly guessed this answer and the problem is that i have forgotten how to do range it would mean alot to me if someone with showing work or telling me about range.

To find range, you need to take the largest data value and subtract it by the smallest data value. So in this case to find the range for Set A you would take the largest number (60) and subtract it by the smallest number (20) to get 40, which is your range for Set A. For set B you would do 60 minus 10 to get 50, which is your range for Set B. Hope this helped!