10 is the mean of a set of 7 observation...

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

8.5

7.5

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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))

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

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.

Create a set of 6 observation with mean 8.

The mean of 5 observations is 8 , Find the sum of the 5 observations.

Create data of 8 observations with mean 10.

The mean of 20 observations is 30. If the mean of first 15 observations is 32, find the mean of last 5 observations.

In ten observation, the mean of all 10 numbers is 15, the mean of the first six observation is 16 and the mean of the last five observation is 12. The sixth number is

OBJECTIVE RD SHARMA ENGLISH-MEASURES OF CENTRAL TENDENCY-Exercise

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