" If "1gcms^(-1)=xNs" ,then what is the value of "x?

The means and variance of n observation x_1, x_2, x_3,....x_n are 5 and 0 respectively . If sum_(i=1)^(n) x_(i)^(2) = 400 , then find the value of n

The sequence [x_n] is a GP with x_2/x_4 = 1/4 and x_1 + x_4 = 108 . What will be the value of x_3 ?

If x_1, x_2, x_3,........x_n are the roots of x^n + ax + b = 0 , then the value of (x_1 - x_2)(x_1 - x_3) (x_1 - x_4) .......(x_1 – x_n) is equal to

Formula of magnesium nitride is written as Mg_xN_y , then the value of (x+y) is

The sum of the deviations of a set of n values x_1, x_2 ,.........x_n measured from 50 is-10 and the sum of deviations of the values from 46 is 70.Find the values of n and the mean.

Given that bar x is the mean and sigma^2 is the variance of n observations x_1x_2 , ..., x_n . Prove that the mean and variance of the observations a x_1,""""a x_2 , a x_3,""""dot""""dot""""dot"""",""a x_n are a bar x and a^2sigma^2 ,

Given that bar x is the mean and sigma^2 is the variance of n observations x_1x_2 , ..., x_n . Prove that the mean and variance of the observations a x_1,a x_2 , a x_3,dotdotdot,a x_n are a bar x and a^2sigma^2 ,