If X and Y are two independent variables, then prove that `var(aX+bY)=a^2var(X)+b^2var(Y)`, where a and b are constants.

answer any one question : (ii) if X and Y are two independent variables , then rove that var(aX+bY ) =a^2 var (X) +b^2 var (Y) , where a and b are constants

if a and b are any two constants, then prove that Var (aX+b)=a^2Var(X) .

Prove that Var (a+bx)= b^(2) Var(x)

If a and b are constants, then show that var (ax+b)=a^2 var (x) .

X is a random variable and 'a' and 'b' are constant show that var(aX+b) = a^2 var(X) .

If a is a constant prove that (i) var(a)=0 (ii) var (aX)=a^(2)var(X) (iii) Var(ax+b)=a^(2)var(X)

If x is a random variable, var(x)=2 then var(2x+3)=

If standard deviation of a ravdom variable x is 2 then var(5x) is

If a coin is tossed twice and X is the number of tails, then var(X)=