The average of a set of 5 numbers is 7. If you add 1 to the set of numbers, what is the new average?

So the average of 5 number is 7 means if you add the number together, then divide the result by 5, you get 7 so

(t+r+x+y+z) / 5=7

but we are only concered what the average is so we assume that all the numbers are the same

exg

(5x) / 5=7

x=7

so lets say that x=7

so 5 (7) / 5=7

if we add 1 to them we are just adding 1 to (5 (7)) = 1+35=36

so the average is

36/5=7 and 1/5 or 7.2