(10[12]) - x = 11(10-1)
120 - x = 99
-x = 120 - 99
-x = -21
-x(-1) = -21(-1)
x = 21
So, the answer is 21.
The average of a single number, such as 245, is the number itself, which is 245. This is because an average is calculated by summing a set of numbers and dividing by the count of those numbers. Since there is only one number in this case, the calculation is straightforward.
The average of any one number is itself. So the answer is 7.
Normally, at least two numbers are used to determine an average. If there is only one number, then the average is the number itself, so the answer is 48.
Nothing could be simpler - no steps required. The answer is always the same: an infinite number of them. There are an infinite number of numbers between any two numbers - however close they are. The average of any two numbers is exactly halfway between them. Then the average of one of the original numbers and the first average is between those two. And the average between that same original number and the new average is exactly between them, and the average ... Hopefully you see the pattern emerging. NB: average = arithmetic mean
The average of nine numbers is 99, that is tha the sum of those numbers was 99 x 9, which is 891. The average of 8 numbers is 89, that is that the sum of those numbers was 89 x 8, which is 712. So, 891 - 712 = 179 The number that was deleted was 179.
Write the numbers of a set in ascending order. If there is an odd number of numbers, the median is the one in the middle. If there is an even number of numbers, the median is the average of the middle two.
To get the range of a group of numbers you subtract the smaller number from the larger one The mean is the "average" for a group of numbers to get the mean you add all the numbers together. Then divide that number by the number in the group.
An average is usually got from two or more numbers. The average of one number is itself, so the average of 759 is just 759.
You add up all the numbers and divide by how many total numbers you have.
The [mean] average of 5 numbers is 25, so their total is 5 x 25 = 125 The [mean] average of 4 numbers is 25, so their total is 4 x 25 = 100 → the excluded number is 125 - 100 = 25. Alternatively, as the average doesn't change, the excluded number must be the average, ie 25.
The mean of number'''s''' means to find the average. You can't find the mean of one number, because it's impossible to find an average of one number.Since the mean is the average, you add all the numbers up, then divide.For example, if your numbers are 10, 7, and 8, you add 10 + 4 + 7 to get 21. 3 (how many numbers there are) divided by 21 is 7. 7 is the average. (Being only 3 numbers, you can't just take the middle number)
If that is what you mean, then you have 3 numbers, not 4, and you can't find an average when the unknown number could be any number. Basically, you have one equation with 2 unknowns and that can't be solved.