The below workout with step by step calculation shows how to find what is the average of numbers from 101 to 200 manually.
step 1 Address the formula and input values.
Formula: Average = Total Sum of Numbers / Total Count of Numbers
Input values:
The numbers from 101 to 200 are
101, 102, 103, 104, . . . . , 198, 199, 200
Total Count of Numbers = 100
step 2 Find the sum of numbers from 101 to 200.
sum = 101 + 102 + 103 + . . . . + 199 + 200
= 15050
step 3 Divide the sum by 100
Average = 15050/100
= 150.5
150.5 is an average of numbers from 101 to 200.