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

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

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

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 the combined set is

Create a set of 5 observations with mean 8.

Create a set of 6 observation with mean 8.

Create a set of 8 observations with mean 14.