Given 4 scores of 78, 76, 82, 84, what should be score number 5 in order to attain an average score of 90?
Setup Average Equation:
| Average = | Sum of our 4 numbers + unknown score of x |
| Total Numbers |
| 90 = | 78 + 76 + 82 + 84 + x |
| 5 |
Cross Multiply
78 + 76 + 82 + 84 + x = 90 x 5x + 320 = 450
Subtract 320 from both sides of the equation to isolate x:
x + 320 - 320 = 450 - 320x = 130
You have 2 free calculationss remaining
What is the Answer?
x = 130
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.
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
For more math formulas, check out our Formula Dossier
What 3 concepts are covered in the Missing Average Calculator?
- average
- 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
- number
- 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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