Question

Find the percentage of even composite numbers from 1 to 20​

Answer 1

step 1 Address the formula, input parameters & values.

Formula: Average = Total Sum of Numbers / Total Count of Numbers

Input parameters & values:

The even composite numbers between 1 and 20 are

4, 6, 8, 10, . . . . , 16, 18, 20

Total Count of Numbers = 9

step 2 Find the sum of even composite numbers between 1 and 20.

sum = 4 + 6 + 8 + . . . . + 18 + 20

= 108

step 3 Divide the sum by 9

Average = 108/9

= 12

Thus, 12 is an average of even composite numbers between 1 and 20.