Special distributions; geometric distribution.

4.4.2. A teenager is trying to get a driver's license. Write out the formula for the pdf px(k), where the random vari- able X is the number of tries that he needs to pass the road test. Assume that his probability of passing the exam on any given attempt is 0.10. On the average, how many at- tempts is he likely to require before he gets his license? 4.4 3. Is the follow