What is the average of odd numbers from 45 to 78? Here we will show you how to calculate the average of odd numbers from 45 to 78.
To find the average of the odd numbers from 45 to 78, we first calculate how many odd numbers there are from 45 to 78. Then, we calculate the sum of odd numbers from 45 to 78. And finally, we divide the sum by the number of odd numbers to get the average.
The range is from 45 to 78, and the odd numbers within that range are from 45 to 77. Therefore, the first odd number in the sequence is 45, and the last odd number in the sequence is 77.
Step 1) Calculate the total number of odd numbers from 45 to 78
Here we calculate the total number of odd numbers from 45 to 78 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 = (77 - 45 + 2) ÷ 2
tot = 34 ÷ 2
tot = 17
Total odd numbers from 45 to 78 = 17
Step 2) Calculate the sum of odd numbers from 45 to 78
To calculate the sum of odd numbers from 45 to 78, 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 = (17 ÷ 2) × (2 × 45 + (2 × (17 - 1))
sum = 8.5 × (90 + 32)
sum = 8.5 × 122
sum = 1037
Sum of odd numbers from 45 to 78 = 1037
Step 3) Calculate the average of odd numbers from 45 to 78
Almost done! Now we can calculate the average of odd numbers from 45 to 78 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 = 1037 ÷ 17
Average = 61
Average of odd numbers from 45 to 78 = 61
Average of Odd Numbers Calculator
Here you can calculate the average of odd numbers of a different sequence.