The below workout with step by step calculation shows how to find what is the average of numbers from 900 to 1000 manually.
step 1 Address the formula and input values.
Formula: Average = Total Sum of Numbers / Total Count of Numbers
Input values:
The numbers from 900 to 1000 are
900, 901, 902, 903, . . . . , 998, 999, 1000
Total Count of Numbers = 101
step 2 Find the sum of numbers from 900 to 1000.
sum = 900 + 901 + 902 + . . . . + 999 + 1000
= 95950
step 3 Divide the sum by 101
Average = 95950/101
= 950
950 is an average of numbers from 900 to 1000.