What is the average of even numbers from 1 to 78? Here we will show you how to calculate the average of even numbers from 1 to 78.
To find the average of the even numbers from 1 to 78, we first calculate how many even numbers there are from 1 to 78. Then, we calculate the sum of even numbers from 1 to 78. And finally, we divide the sum by the number of even numbers to get the average.
The range is from 1 to 78, and the even numbers within that range are from 2 to 78. Therefore, the first even number in the sequence is 2, and the last even number in the sequence is 78.
Step 1) Calculate the total number of even numbers from 1 to 78
Here we calculate the total number of even numbers from 1 to 78 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 = (78 - 2 + 2) ÷ 2
tot = 78 ÷ 2
tot = 39
Total even numbers from 1 to 78 = 39
Step 2) Calculate the sum of even numbers from 1 to 78
To calculate the sum of even numbers from 1 to 78, 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 = (39 ÷ 2) × (2 × 2 + (2 × (39 - 1))
sum = 19.5 × (4 + 76)
sum = 19.5 × 80
sum = 1560
Sum of even numbers from 1 to 78 = 1560
Step 3) Calculate the average of even numbers from 1 to 78
Almost done! Now we can calculate the average of even numbers from 1 to 78 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 = 1560 ÷ 39
Average = 40
Average of even numbers from 1 to 78 = 40
Average of Even Numbers Calculator
Here you can calculate the average of even numbers of a different sequence.