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You cannot. The average of a set of numbers requires their sum and that requires each of them - unless there is some other way to obtain tat information.

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Q: How do you find the average if you only have 3 of the 4 numbers you need?
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Related questions

If given an average how do you figure out the rest of the numbers?

If the only thing you're told is the average, there's no way to figure out what the individual numbers are. There are an infinite supply of groups of numbers that all have the same average. If you need to find the individual numbers, you need a lot more information besides just their average.


What is the average of 1009509389?

It is impossible to find an average. Finding an average requires 2 or more numbers but there is only 1 in your question.


How do you find out a median when there is only two numbers left?

If you need to find a median between two numbers, pick one of them arbitrarily.


How do you find an average of a number if it only tells you the average and how many numbers there are?

Why would you want to "find" the average if you are already told the average? Normally if you are told to "find" some information, that refers to information that isn't known from the beginning.


What is the median if there is only 2 numbers showing?

Technically, you cannot find a median if you have only two numbers, so it would be more reasonable to use an average instead.


How do you find a set of numbers if you have the range mean and median?

In general, you cannot. You need to know how many numbers there are and then, in only a select few cases can you find the set.


A cars velocity changes from 20ms to 50ms 1o seconds later what is the cars average acceleration?

To find out an average for anything, you need to take 20 and 50, multiply the two numbers, divide by how many numbers there is, which there is only 2, so it averages to 50ms. I am still in school so I know this is the correct answer


What is the greatest common factor of 13 only?

You need at least two numbers to find a GCF.


What is the HCF of 25 and 15?

It is not possible to give a sensible answer to this question. The highest common factor (HCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question!


What is the LCM of 5 only?

You need at least two numbers to find an LCM.


What is the LCM of 48 only?

You need at least two numbers to find an LCM.


How do you get the mean of a number?

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)