Show transcribed image text Problem 13 Suppose that r balls are thrown into n boxes, independently, and so that each ball is equally likely to fall into each of the boxes. Let X be the number of unoccupied boxes. Find E(X ).
Problem 13 Suppose that r balls are thrown into n boxes, independently, and so that each ball is equally likely to fall into each of the boxes. Let X be the number of unoccupied boxes. Find E(X ).