Question

The sum of deviations of 15 value from 20 is 45 . find arithmetic mean ? what is its answer

Answer 1

Answer:

Given,

assumed mean=20

no. of observations=15

sum of deviations=45

actual mean=assumed mean+(sum of deviations/ no. of observations)

actual mean=20+(45/15)

=20+3

actual mean=23

Answer 2

The value of arithmetic mean is 23.

Step-by-step explanation:

Given:

The sum of deviations of 15 value from 20 is 45.

To Find:

The value of arithmetic mean.

Formula Used:

$Arithmetic\ Mean=\frac{sum\ of\ observations}{number of observations}$

Solution:

As given,the sum of deviations of 15 value from 20 is 45.

Sum of deviations= 45

Number of observations=15

$Arithmetic\ Mean=\frac{45}{15}$

           $=3$

But,  observation starts from =20.

Therefore, Arithmetic Mean $= 20+3=23$

Thus, the arithmetic  mean is 23.

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