The mean of 7 observations is 20 If the mean of the first 4 observations id 12 and that - Maths - Statistics

Question

The mean of 7 observations is 20 If the mean of the first 4
observations id 12 and that of last 4 observations id 28, find the
4th observations

Varun Rawat · Accepted Answer

The mean of 7 observations is 20. If the mean of the first 4 observations id 12 and that of last 4 observations id 28, find the 4th observations.