10 is the mean of a set of 7 observations and 5 is the mean of a set of 3 observations, the mean of the combined set is

10 is the mean of a set of 7 observations and 5 is the mean of a set of 3 observations. The mean of a combined set is given by

Observe the following statements : (A) : 10 is the mean of a set of 7 obervations and 5 is the mean of a set of 3 observations. The mean of a combined set is 9. (R ) : If bar(x)_(i)(i = 1,2,…,k) are the means of k - series n_(i)(I = 1,2,3,…,k) respectively, then the combined or composite mean is bar(x) = (n_(1)bar(x)_(1) + n_(2) bar(x)_(2) + ...+ n_(k)bar(x_(k)))/(n_(1)+n_(2)+...+n_(k))

Observe the following statements : (A) : 10 is the mean of a set of 7 obervations and 5 is the mean of a set of 3 observations. The mean of a combined set is 9. (R ) : If bar(x)_(i)(i = 1,2,…,k) are the means of k - series n_(i)(I = 1,2,3,…,k) respectively, then the combined or composite mean is bar(x) = (n_(1)bar(x)_(1) + n_(2) bar(x)_(2) + ...+ n_(k)bar(x_(k)))/(n_(1)+n_(2)+...+n_(k))

The mean of a set of 20 observations is 8 and of another set of 30 observations is 10. The mean of combined set is

If 150 is the mean of 200 observations and 100 is the mean of some 300 other observations, find the mean of the combination.

The mean of a set of 12 observations is 10 and another set of 8 observations is 12. The mean of combined set is ______.

The mean of a set of 20 observations is 8 an another set of 30 observations is 10. The mean of combined set is ________.

Create a set of 6 observations with mean 10.

Create a set of 8 observations with mean 14.

Create a set of 5 observations with mean 8.