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Question

The average of 'n' number of observations is given as 5. If the sum of all observations is 20, what is the value of n?
 


A

2
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B

4
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C

6
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D

8
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Solution

The correct option is C
4
We know, the Average of n observations is given by:

Average=Sum of all observationsTotal number of observations

Given,
Sum of all observations = 20
Average = 5
Total number of observations = n


 5=20n

n=4


 

Mathematics

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