The average of temperatures at noontime from Monday to Friday is 50; the lowest one is 45, what is the possible maximum range of the temperatures?
there are 5 days so the sum of temperature can be 50*5=250
lowest is 45. to find the maximum range we can say the temperature was the lowest for 4 of the 5 days
on the fifth day it is 250-180=70
range is therefore 70-45=25
If 70 was one of the answer choices I am afraid I would have overlooked the range and chosen it