Question

Mean of 20 observation is 15 if observation 3 and 14 was replaced by 8 and 9 respectively what will be the new mean

Answer 1

Answer:

since 3 and 14 are replaced by 8 and 9, ther is no change in sum of observations or number of observations so, the mean remains same so the mean is 15

Answer 2

The new mean is 15.

Step-by-step explanation:

Consider the provided information.

$\text{Mean}=\frac{\text{Sum of terms}}{\text{Number of terms}}$

$15=\frac{\text{Sum of terms}}{20}$

$\text{Sum of terms}=300$

New sum will be:

300-3-14+8+9=300

New mean is:

$\text{Mean}=\frac{300}{20}$

$\text{Mean}=15$

Hence, the new mean is 15.

#Learn more

https://brainly.in/question/5719

The mean of 10 observation is 15. If an observation 24 is deleted , find the mean of the remaining observation