What is the average of odd numbers from 100 to 140? Here we will show you how to calculate the average of odd numbers from 100 to 140.
To find the average of the odd numbers from 100 to 140, we first calculate how many odd numbers there are from 100 to 140. Then, we calculate the sum of odd numbers from 100 to 140. And finally, we divide the sum by the number of odd numbers to get the average.
The range is from 100 to 140, and the odd numbers within that range are from 101 to 139. Therefore, the first odd number in the sequence is 101, and the last odd number in the sequence is 139.
Step 1) Calculate the total number of odd numbers from 100 to 140
Here we calculate the total number of odd numbers from 100 to 140 by entering the first and last odd number in the sequence into our formula. Here is the formula and the math:
tot = (last - first + 2) ÷ 2
tot = (139 - 101 + 2) ÷ 2
tot = 40 ÷ 2
tot = 20
Total odd numbers from 100 to 140 = 20
Step 2) Calculate the sum of odd numbers from 100 to 140
To calculate the sum of odd numbers from 100 to 140, you enter the total odd numbers (tot) from Step 1 and the first odd number in the sequence into our formula. Here is the formula and the math:
sum = (tot ÷ 2) × (2 × first + (2 × (tot - 1))
sum = (20 ÷ 2) × (2 × 101 + (2 × (20 - 1))
sum = 10 × (202 + 38)
sum = 10 × 240
sum = 2400
Sum of odd numbers from 100 to 140 = 2400
Step 3) Calculate the average of odd numbers from 100 to 140
Almost done! Now we can calculate the average of odd numbers from 100 to 140 by dividing the sum of odd numbers from Step 2 by the total odd numbers from Step 1. Here is the formula, the math, and the answer:
Average = sum ÷ tot
Average = 2400 ÷ 20
Average = 120
Average of odd numbers from 100 to 140 = 120
Average of Odd Numbers Calculator
Here you can calculate the average of odd numbers of a different sequence.