What is the Average of Even Numbers between 100 and 500?

The below workout with step by step calculation shows how to find what is the average of even numbers between 100 and 500 manually.
step 1 Address the formula, input parameters & values.
Formula: Average = Total Sum of Numbers / Total Count of Numbers
Input parameters & values:
The even numbers between 100 and 500 are
100, 101, 102, 103, . . . . , 498, 499, 500
Total Count of Numbers = 401

step 2 Find the sum of even numbers between 100 and 500.
sum = 100 + 101 + 102 + . . . . + 499 + 500
= 120300

step 3 Divide the sum by 401
Average = 120300/401
= 300

Thus, 300 is an average of even numbers between 100 and 500.

The below are the other calculators to find the average of odd, even, composite & prime numbers.