If the area to the right of x in a normal distribution is 0.65, what is the area to the left of x ? A)0.35
B)0.45
C) 0
D)0.65

Let x have probability generating function gx (s) and let un generating function u(s) of the sequence uo, u1, satisfies p(x > n). show that the (1- s)u(s) = 1 - gx(s), whenever the series defining these generating functions converge.