Question: 3. 9 19 , 6 19 , 4 19 . The mean number of throws is 3. 4. [q/(1 ps)]N . The variance is

3. 9 19 , 6 19 , 4 19 . The mean number of throws is 3.

4. [q/(1 − ps)]N . The variance is Np(1 − p)−2.

5. The first part of this problemmay be done by way of Theorem4.36, with N+1 having a geometric distribution and the Xi having the Bernoulli distribution. Alternatively, use the methods of Chapter 3. The answer to the first part is 2(1− p)pr (2− p)−r−1, and to the second part

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