Question

the mean of 8 observations is 25 if 5 is subtracted from each observation then find the new mean ​

Answer 1

Answer:

if mean of 8 observations is 25

if 5 is subtracted from each number

25-5=20

Answer 2

The new mean is 20

Step-by-step explanation:

$Mean = \frac{\text{Sum of all observations}}{\text{No. of observations}}$

The mean of 8 observations is 25

$25= \frac{\text{Sum of 8 observations}}{8}$

$25 \times 8 = \text{Sum of 8 observations}$

$200= \text{Sum of 8 observations}$

We are given that 5 is subtracted from each observation

So, New sum = 200-5(8)=160

New mean = $\frac{160}{8}=20$

Hence The new mean is 20

#Learn more:

The mean of 17 observations is 31 if three new observations 20,23 and 50 are added find the new mean​

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