The mean of eight numbers is 21 If the mean of the first six numbers is 20 and - Maths - Statistics

Question

The mean of eight numbers is 21 If the mean of the first six
numbers is 20 and the mean of the last six numbers is 21 5 , then
what is the mean of the middle four numbers ?

Manbar Singh · Accepted Answer

The mean of eight numbers is 21 . If the mean of the first six numbers is 20 and the mean of the last six numbers is 21.5 , then what is the mean of the middle four numbers ?