1. The problem statement, all variables and given/known data http://img141.imageshack.us/img141/1395/40941671kx8.jpg [Broken] http://img141.imageshack.us/img141/982/82443157pt9.jpg [Broken] 2. Relevant equations http://img85.imageshack.us/img85/4523/60192566ie7.jpg [Broken] 3. The attempt at a solution I'm not sure where to start with this one. I've searched through textbooks and the internet and have not found anything that helps me remotely show the Pr density at D. Would appreciate it if someone could give me a start and help guide me through. Thanks!