Question

The mean of 12 observations is 7.5. If the mean of 7 of these observations is 6.5,the mean of the remaining observations is​

Answer 1

Answer:

The mean of remaining observation is 8.9.

Step-by-step explanation:

Since we have given that

Number of observation = 12

Arithmetic mean = 7.5

So, it becomes,

Number of observation = 7

Mean = 6.5

So, it becomes

So, the mean of  remaining observation would be

Hence, the mean of remaining observation is 8.9.