What is the average of even numbers from 7 to 129? Here we will show you how to calculate the average of even numbers from 7 to 129.
To find the average of the even numbers from 7 to 129, we first calculate how many even numbers there are from 7 to 129. Then, we calculate the sum of even numbers from 7 to 129. And finally, we divide the sum by the number of even numbers to get the average.
The range is from 7 to 129, and the even numbers within that range are from 8 to 128. Therefore, the first even number in the sequence is 8, and the last even number in the sequence is 128.
Step 1) Calculate the total number of even numbers from 7 to 129
Here we calculate the total number of even numbers from 7 to 129 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 = (128 - 8 + 2) ÷ 2
tot = 122 ÷ 2
tot = 61
Total even numbers from 7 to 129 = 61
Step 2) Calculate the sum of even numbers from 7 to 129
To calculate the sum of even numbers from 7 to 129, 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 = (61 ÷ 2) × (2 × 8 + (2 × (61 - 1))
sum = 30.5 × (16 + 120)
sum = 30.5 × 136
sum = 4148
Sum of even numbers from 7 to 129 = 4148
Step 3) Calculate the average of even numbers from 7 to 129
Almost done! Now we can calculate the average of even numbers from 7 to 129 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 = 4148 ÷ 61
Average = 68
Average of even numbers from 7 to 129 = 68
Average of Even Numbers Calculator
Here you can calculate the average of even numbers of a different sequence.