Question

3. One set of 100 observations has the mean as 15 and another set of 150 observations has
the mean as 16. Find the mean of 250 observations by combining the two sets of given
​

Answer 1

Answer:

51

Step-by-step explanation:

Mean of 100 observation =50

∴Total of 100 observation=100×50=5000

If one of the observation 50 is replaced by 150 than total of new observation is=5000−50+150=5100

Hence the mean of new 100 observation=1005100=51