The value of mean `(bar(X))` is 41.6 and `sumx_(i)f_(i)=1248` What is the value of N?

The value of mean is 56.8 " and " Sigmax_(i)f_(i) = 2840 . What is the value of N?

Choose the correct alternative for each of the following questions : The value of mean is 56.8 and sumx_i = 2840 . What is the value of N ?

The value of i^n + i^-n

If x_(1), x_(2), ………,x_(n) are n values of a variable x such that sum(x_(i)-3) = 170 and sum(x_(i)-6) = 50. Find the value of n and the mean of n values.

If x_(1), x_(2), ………,x_(n) are n values of a variable x such that sum(x_(i)-3) = 170 and sum(x_(i)-6) = 50. Find the value of n and the mean of n values.

If x_1,x_2,.......,x_n are n values of a variable X such that sum_(i=1)^n (x_i-2)=110 and sum_(i=1)^n(x_i-5) =20 . Find the value of n and the mean.

Find the value of the mean barX , " if " Sigma f_(i) x_(i) = 30 " and " Sigma f_(i) = 6 .