The below workout with step by step calculation shows how to find what is the average of numbers from 50 to 70 manually.
step 1 Address the formula and input values.
Formula: Average = Total Sum of Numbers / Total Count of Numbers
Input values:
The numbers from 50 to 70 are
50, 51, 52, 53, . . . . , 68, 69, 70
Total Count of Numbers = 21
step 2 Find the sum of numbers from 50 to 70.
sum = 50 + 51 + 52 + . . . . + 69 + 70
= 1260
step 3 Divide the sum by 21
Average = 1260/21
= 60
60 is an average of numbers from 50 to 70.