Given scores of 74,78,63, what should the next score be in order to attain an average score of 80?

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Given 3 scores of 74, 78, 63, what should be score number 4 in order to attain an average score of 80?

Setup Average Equation:

Average =

Sum of our 3 numbers + unknown score of x

Total Numbers

80 =

74 + 78 + 63 + x

4

Cross Multiply

74 + 78 + 63 + x = 80 x 4 x + 215 = 320

Subtract 215 from both sides of the equation to isolate x:

x + 215 - 215 = 320 - 215

x = 105

What is the Answer?

x = 105

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

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