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28-02-2021
Mathematics

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the mean of 4 numbers is 21. calculate the sum of the 4 numbers

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jimrgrant1 jimrgrant1

28-02-2021

Answer:

84

Step-by-step explanation:

The mean is calculated as

mean = [tex]\frac{sum}{count}[/tex] , then

[tex]\frac{sum}{4}[/tex] = 21 ( multiply both sides by 4 )

sum = 84

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