3. Suppose a box contains n chips. Chips are successively drawn from the box at random and then replaced into the box. The process continues until a chip that has previously been drawn is drawn from...

1,

Extracted text: 3. Suppose a box contains n chips. Chips are successively drawn from the box at random and then replaced into the box. The process continues until a chip that has previously been drawn is drawn from the box. Let X be the number of draws. Com- pute the PMF of X. Is there an approximation of X?