The mean of` x-2a,x-a,x+a,x+2a` is

The mean of x,x+2,x+4,x+6 and x+8 is 11, find the mean of the first three observations.

If M is the mean of x1 , x2 , x3 , x4 , x5 and x6, prove that (x1 − M) + (x2 − M) + (x3 − M) + (x4 − M) + (x5 — M) + (x6 − M) = 0

If the mean of observations x_1,\ x_2,\ ....,\ x_n is x , then the mean of x_1+a ,\ x_2+a ,\ .... ,\ x_n+a is (a) a x (b) x -a (c) x +a (d) ( x )/a

Find the mean of x, x+2, x+4, x+6, x+8

If the mean of x+2,\ 2x+3,\ 3x+4,\ 4x+5 is x+2 , find x

If the mean of x_(1),x_(2) is 7.5 and the mean of x_(1),x_(2),x_(3) is 8, then the value of x_(3) is

If sum_(i=1)^5x_i^2=40&sum_(j=6)^(10)x_j^2=20 and mean of x_1,x_2, ...,x_5 is 1 and mean of x_6,x_7, ...,x_(10) is 2 then variance of x_1,x_2 ,...x_(10) is

if x < y < 2x and the mean and median of x,y,2x are 15,12 respectively then x

If barx is the mean of x_(1), x_(2), …………., x_(n) , then for a ne 0 , the mean of ax_(1), ax_(2),…….., ax_(n), x_(1)/a, x_(2)/a, ……….., x_(n)/a is

If the mean of x+2,\ 2x+3,\ 3x+4,\ 4x+5\ i s\ x+2, find x