Suppose that we make successive trials which result in success or failure and that the probability the first success occurs on or after the nth trial is l/n for n = 1, 2, (a) Find an expression for...

Suppose that we make successive trials which result in success

or failure and that the probability the first success occurs on

or after the nth trial is l/n for n = 1, 2,

(a) Find an expression for the probability that the first

success occurs on trial n.

(b) What is the conditional probability that the first

success occurs on trial n given at least n trials are

required?