<-- Enter Scores
<-- Enter Average

Given 2 scores of 20, 30, what should be score number 3 in order to attain an average score of 40?

Setup Average Equation:

Average  =  Sum of our 2 numbers + unknown score of x
  Total Numbers

40  =  20 + 30 + x

Cross Multiply

20 + 30 + x = 40 x 3
x + 50 = 120

Subtract 50 from both sides of the equation to isolate x:

x + 50 - 50 = 120 - 50
x = 70

You have 2 free calculationss remaining

What is the Answer?
x = 70
How does the Missing Average Calculator work?
Free Missing Average Calculator - Given a set of scores and an average, this calculates the next score necessary to attain that average
This calculator has 2 inputs.

What 1 formula is used for the Missing Average Calculator?

Average = (your Sum of all numbers + unknown score of x)/Total Numbers

For more math formulas, check out our Formula Dossier

What 3 concepts are covered in the Missing Average Calculator?

A number expressing the central value of a set
Sum of Values/n
missing average
A score or rank required to reach a certain average
an arithmetical value, expressed by a word, symbol, or figure, representing a particular quantity and used in counting and making calculations and for showing order in a series or for identification. A quantity or amount.
Example calculations for the Missing Average Calculator

Missing Average Calculator Video


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