Aptitude Average Problems

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Aptitude Average Problems

The average of n quantities of the same kind is equal to the sum of all the quantities divided by the number of quantities;The average of n quantities of the same kind is equal to the sum of all the quantities divided by the number of quantities.

To calculate average add up all the numbers, then divide by how many numbers there are.

what is the average of 2, 7, 8 and 9?

Example

Add the numbers: 4 + 7 + 8 + 9 = 28 Divide by how many numbers (i.e. we added 4 numbers): 28 / 4 = 7 So the average is 7

Formula

Average = Sum of Quantities
Number of Quantities

Formula

Sum of quantities = Average * Number of quantities

Formula

Number of Quantities = Sum of Quantities
Average

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