What is the average of even numbers from 10 to 20? Here we will show you how to calculate the average of even numbers from 10 to 20.
To find the average of the even numbers from 10 to 20, we first calculate how many even numbers there are from 10 to 20. Then, we calculate the sum of even numbers from 10 to 20. And finally, we divide the sum by the number of even numbers to get the average.
The range is from 10 to 20, and the even numbers within that range are from 10 to 20. Therefore, the first even number in the sequence is 10, and the last even number in the sequence is 20.
Step 1) Calculate the total number of even numbers from 10 to 20
Here we calculate the total number of even numbers from 10 to 20 by entering the first and last even number in the sequence into our formula. Here is the formula and the math:
tot = (last - first + 2) ÷ 2
tot = (20 - 10 + 2) ÷ 2
tot = 12 ÷ 2
tot = 6
Total even numbers from 10 to 20 = 6
Step 2) Calculate the sum of even numbers from 10 to 20
To calculate the sum of even numbers from 10 to 20, you enter the total even numbers (tot) from Step 1 and the first even number in the sequence into our formula. Here is the formula and the math:
sum = (tot ÷ 2) × (2 × first + (2 × (tot - 1))
sum = (6 ÷ 2) × (2 × 10 + (2 × (6 - 1))
sum = 3 × (20 + 10)
sum = 3 × 30
sum = 90
Sum of even numbers from 10 to 20 = 90
Step 3) Calculate the average of even numbers from 10 to 20
Almost done! Now we can calculate the average of even numbers from 10 to 20 by dividing the sum of even numbers from Step 2 by the total even numbers from Step 1. Here is the formula, the math, and the answer:
Average = sum ÷ tot
Average = 90 ÷ 6
Average = 15
Average of even numbers from 10 to 20 = 15
Average of Even Numbers Calculator
Here you can calculate the average of even numbers of a different sequence.