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Q: If the average of these four numbers are 21 find the missing number the numbers are 12 18 28 and?

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The average of a set of numbers is defined as the sum of those numbers divided by the number of numbers. If the average is given, multiply that by number of items in the set including the missing number. Subtract the sum of given numbers from this quotient and the missing number is revealed.

The median is the middle number. If there is an odd number of numbers in the set, the median is the middle number, and the only way to find the missing number is if the median is the missing number. If there is an even number of numbers in the set, the median is the average of the two middle numbers, and the only way to find the missing number is if the median is one of those two numbers. If it is, you can take the median and the one of the two numbers you know. Use the formula (# +#)/2=median and solve.

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Given the average,find the missing numbr in a set by following these steps: 1.Multiply the average by the number of items in the set. 2.Add the given numbers ni the set. 3.Find the difference of the product in step 1 and step2.

you find out missing numbers in addition by subtracting the numbers that are writen

The answer depends on what number is missing and what numbers are known!

the missing number in the series 1,4,27.----.3125 is 81,35,729,256,115 .Please help to find the missing number.

Add all the numbers and divide it by however many numbers you added, then that's how you get the missing number to help you complete the mean.

The Average number is the average of the numbers you're trying to find. To find the average number, you must add up all the numbers first and then divide by the number of numbers. Trust Point Me if this helped, Thanks!

To find the average of a list of numbers, add the numbers and divide by the number of numbers in the list.

using mental math to find the missing numbers. make 8 12345 _ _ _ _ 4 what are the missing numbers Make 6 0 _ _ _ 6 _ _ _ what are the missing numbers

If there is no mean it is very rare that you will be able to find a missing number. Potentially if you have other numbers and you have a mode you can deduce the missing number by using the mode (if there needs to be one more of a certain number or a certain number cannot be increased in its count of numbers i.e. you can't have more 6's to maintain the current mode).

You can easily find the mean of a group of numbers by getting the average. You can do that by simply adding up all of the numbers and then dividing that number by the number of numbers that you have.

To find the average of a given set of numbers, total the numbers and divide that total by the number of members of the set.

Add them together, then divide that total by the number of numbers in the set.

add up all the numbers and then divide that number by the number of numbers that you added up.

Find the average. That is, add all of the even numbers together, then divide that by the number of even numbers.

The same as you would find the average of other numbers. Add all the numbers together, then divide by the size of the set - by the number that indicates how many numbers you have.

If you have to find a median in a set of numbers in which there are an even number of entries, you must find the average of the two numbers the come in the middle.

You find it by lying the numbers in order and see which number has the same two numbers and that's your answer..

It is the mean average

The average of a set of numbers is the sum of the numbers in the set divided by the number of elements in the set.

The same as you find the average of any other type of number. You add the numbers, then divide the result by the amount of numbers. For example, to find the average of three different numbers, you add them all, then divide the result by 3.

The average of a group of numbers is equal to the sum of the numbers divided by the number of numbers. If you want to find the sum of the five numbers, just multiply 790.6 by 5 to get the sum, which is 3953

A grade is usually assigned a number as well. To find the average, you will need to add the numbers of the grades. Then, divide the sum by the number of grades there are.