`{:(X,-1,0,1,2),(P(X),0.1,0.2,0.4,0.3):}`

A random variable X has the following distribution {:(x:,1,2,3,4),(P(X=x):,0.1,0.2,0.3,0.4):} Then its mean is

A random varibale X has the following probability distribution. {:(X:,1,2,3,4,5),(P(X):,0,0.1,0.2,0.3,0.4):} Find the mean.

Select and write the correct answer from the given alternatives in each of the following : A random variable X has the following probability distribution : {:(X=x,-2,-1,0,1,2,3),(P(x),0.1,0.1,0.2,0.2,0.3,0.1):} Then E(x) = ………

The probability distribution of a random variable X is given by {:(X=x,0,1,2,3,4),(P(X=x),0.4,0.3,0.1,0.1,0.1):} The variance of X is

A random variable X has the following distribution {:(x,:-3,-2,-1,0,1,2,3),(P(X=x):,0.05,0.1,0.3,0,0.3,0.15,0.1):} The mean and variance are

The probability distribution of a random variable X is given by. {:(X=x:,0,1,2,3,4),(P(X=x):,0.4,0.3,0.1,0.1,0.1):} The variance of X, is

The probability distribution of a random variable X is given by. {:(X=x:,0,1,2,3,4),(P(X=x):,0.4,0.3,0.1,0.1,0.1):} The variance of X, is

find x, if [x" "-5" "-1][{:(1,0,2),(0,2,1),(2,0,3):}][{:(x),(4),(1):}]=0