Question

If the mean and sum of n observations are 5 and 50, find the value of n.

Answer 1

Hey there!!

The total number of observations = n

The sum = 50

Mean = 5

Mean = The sum of observations / The total number of observations

5 = 50 / n

5 n = 50

n = 10

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Answer 2

$\textbf {Hey there, here is the solution.}$

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STEP 1: Express sum of observations in term of n:

Mean of n observation = 5

Sum of n observation = 5n

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STEP 2: Form equation:

Sum of n observation = 5n

Sum of n observation = 50 (Given)

5n = 50

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STEP 3: Find n:

5n = 50

Divide both sides by 5:

n = 10

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Answer: The value of n is 10.

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$\textbf {Cheers}$