Just take the sum of all the given numbers and divide by the total numbers given
like eg: the numbers are given like 1,2,3,4.
to find out the average,add all of them
like this,1+2+3+4 and divide by 4 since the total no's are 4 and u will get the answer as 10/4 and that is nothing but average which u have got
hope u understood it
and pls mark my best if u understood it:)