The arithmetic mean of the observations 10, 8, 5, a, b is 6 and their variance is 6.8. Then ab=

The arithmetic mean of the observation 10,8,5,a,b is 6 and their variance is 6.8. Then ab =

The mean of 5 observations 1,2,6,x and y is 4.4 and their variance is 8.24 , then x+y is

The mean of 5 observations 1,2,6,x and y is 4.4 and their variance is 8.24 , then x+y is

If the mean of the numbers a, b, 8, 5, 10 is 6 and their variance is 6.8, then ab is equal to

The mean of the number a,b,8,5,10 is 6 and the variance is 6.80 . Then ab =

The mean of the numbers a, b, 8, 5, 10 is 6 and the variance is 6.80. Then which one of the following gives possible values of a and b ?

The mean of the numbers a, b, 8, 5, 10 is 6 and the variance is 6.80. Then which one of the following gives possible values of a and b ?

The mean of the numbers a, b, 8, 5, 10 is 6 and the variance is 6.80. Then which one of the following gives possible values of a and b?

The arithmetic mean of 11 observations is 11. The arithmetic mean of the first 6 observations is 10.5 and the arithmetic mean of the last 6 observations is 11.5. What is the sixth observation ?