Question

What is the average of all integers from 11 to 35

Answer 1

24 becuase add the two together then divide by two

Answer 2

1st let's calculate the sum from 1 to 35:

it's an arithmetic progression  with first term a = 11, last term = 35 and the number of term n = 25

s= (11+35)25/2 = 575

Average = 575/25 = 23