Question

Number of observations are 30 and value of arithmetic mean is 15 then sum of all values is _______

Answer 1

Step-by-step explanation:

Arithmetic mean=(sum of all observations)/(Number of observations)

15=(x)/(30)

x=15×30

x=450

Answer 2

The sum of all values is 450.

Step-by-step explanation:

The formula to compute the arithmetic mean is:

$AM=\frac{1}{n}\sum x$

Given:

n = 30

AM = 15

Compute the sum of all values as follows:

$AM=\frac{1}{n}\sum x$

  $15=\frac{1}{30}\sum x$

$\sum x=15\times 30\\\sum x=450$

Thus, the sum of all values is 450.

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