If the mean and variance of eight numbers 3, 7, 9, 12, 13, 20, x and y be 10 and 25 respectively, then x.y is equal to _______.

If mean and variance of 2, 3, 16, 20, 13, 7, x, y are 10 and 25 respectively then find xy

If mean and variance of 2, 3, 16, 20, 13, 7, x, y are 10 and 25 respectively then find xy

If the mean and variance of six observations 7,10, 11, 15 a, b are 10 and (20)/(3), respectively, then value of |a-b| is equal to :

If the mean and variance of the following data: 6, 10, 7, 13, a, 12, b, 12 are 9 and (37)/(4) respectively, then (a-b)^(2) is equal to

Find the mean and variance for each of the data in 6, 7, 10, 12, 13, 4, 8, 12

Let the mean and variance of four numbers 3, 7, x and y (x gt y) be 5 and 10 respectively. Then the mean of four numbers 3 + 2x, 7 + 2y, x + y and x - y is ___ _

Mean and variance of 7 observation 2,4,10,12,14,x,y are 8 and 16 respectively. find xy is

The mean and variance of 5,7,12,10,15,14,a,b are 10 and 13.5 respectively then value of |a-b|=

The mean and variance of 5,7,12,10,15,14,a,b are 10 and 13.5 respectively then value of |a-b|=

If the mean of the numbers 6, 7, x, 8, y, 16 is 9 then ____