average all numbers from 1 to 100 that end in 8
To find the average of all numbers from 1 to 100 that end in 8, we need to identify all these numbers and then calculate their sum before dividing by the total count.
The numbers from 1 to 100 that end in 8 are: 8, 18, 28, 38, 48, 58, 68, 78, 88, 98.
To find the sum of these numbers, we can simply add them together:
8 + 18 + 28 + 38 + 48 + 58 + 68 + 78 + 88 + 98 = 568.
Now, let's count how many numbers we have (which is 10 in this case). We can divide the sum of these numbers (568) by the total count (10) to find the average:
Average = 568 / 10 = 56.8.
Therefore, the average of all numbers from 1 to 100 that end in 8 is 56.8.
To find the average of all numbers from 1 to 100 that end in 8, we first need to identify all the numbers that fit the criteria.
Step 1: Find the first number that ends in 8. The first such number is 8 itself.
Step 2: Find the last number that ends in 8. The last number is 98.
Step 3: Calculate the total sum of all the numbers. This can be done using the formula for the sum of an arithmetic series: Sn = (n/2) * (a + l), where Sn is the sum of the series, n is the number of terms, a is the first term, and l is the last term.
In our case, n = (98 - 8) / 10 + 1 = 10, because there are 10 numbers between 8 and 98 that end in 8. The first term, a, is 8 and the last term, l, is 98.
The sum, S, is given by: S = (n/2) * (a + l) = (10/2) * (8 + 98) = 5 * 106 = 530.
Step 4: Calculate the average by dividing the sum by the number of terms: Average = S / n = 530 / 10 = 53.
Therefore, the average of all numbers from 1 to 100 that end in 8 is 53.
To find the average of all numbers from 1 to 100 that end in 8, we first need to identify the numbers that satisfy this criterion. These numbers are: 8, 18, 28, 38, 48, 58, 68, 78, 88, and 98.
To calculate the average, we sum up all these numbers and then divide by the total count.
The sum of these numbers is 8 + 18 + 28 + 38 + 48 + 58 + 68 + 78 + 88 + 98 = 568.
Next, we divide this sum by the total count, which is 10, since there are 10 numbers that end in 8 from 1 to 100 (8, 18, 28, 38, 48, 58, 68, 78, 88, and 98).
Dividing the sum (568) by the count (10) gives us an average of 56.8.
Therefore, the average of all numbers from 1 to 100 that end in 8 is 56.8.