If V(X+Y) = V(X) + V(Y), then x and Y are _____ random variables. (Fill in the blank).

If X and Y are two independent random variable, then E(XY) = ?

Construct 3 binomials with x and y as a variable,

Answer as directed: if X and Y are two random variables, under what condition E(XY) = E(X).E(Y) ?

Are the lines y=x and y+x=0 perpendicular?

If A=[(5,x),(y,0)] and A=A^(T) , then what is the relation between x and y?

If x+y=3 and xy=2 , then the value of x-y is

if f(x+y)=f(x)+ f(y) for all x and y and if f(x) is continuous at x=0, show that f(x) is continuous everywhere.

If .^nC_x=^nC_y and x ne y ,then x+y=? .

If 2x+y=45 and x+2y=15 then x+y is _________.

Fill in the blank: The ______ of a polynomial are the x-coordinates of the point of intersection i.e. where y coordinate is ________.