There are 3 observations in a set of data and their mean is 10. If each observation is multiplied by 5, find the change in mean.

A. 50 B. 150

C. 30 D. 40

Open in App

Solution

_

Suggest Corrections

Similar questions

Q. There are 7 observations in the data and their mean is 11. If each observation is multiplied by
2, then the mean of new observations is

(a) 11 (b) 13 (c) 22 (d) 55

There are 3 observations in a set of data and their mean is 10. If each observation is multiplied by 5, find the new mean.

A. 50 B. 150

C. 100 D. 30

Q. The mean of set of

30

observations is

75.

If each of the observations is multiplied a non-zero number

λ

and then each of them is decreased by

25

, their mean remains same then

λ = \frac{4}{3}

Find the mean and variance for the following frequency distribution

$\begin{matrix} Classes & 0 - 30 & 30 - 60 & 60 - 90 & 90 - 120 & 120 - 150 & 150 - 180 & 180 - 210 Frequency & 2 & 3 & 5 & 10 & 3 & 5 & 2 \end{matrix}$

The mean and standard deviation of six observations are 8 and 4, respectively. If each observation is multiplied by 3, find the mean and new standard deviation of the resulting observations.

Q. The mean of a set of

30

observations is

75

. If each other observation is multiplied by a non-zero number

λ

and then each of them is decreased by

25

, their mean remains the same. The

λ

is equal to

Join BYJU'S Learning Program

There are 3 observations in a set of data and their mean is 10. If each observation is multiplied by 5, find the change in mean. A. 50 B. 150 C. 30 D. 40

_

There are 3 observations in a set of data and their mean is 10. If each observation is multiplied by 5, find the change in mean.

A. 50 B. 150

C. 30 D. 40