{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# post7 - STAT 511-2 Spring 2012 Lecture 7 Jun Xie Finish the...

This preview shows pages 1–2. Sign up to view the full content.

1 STAT 511-2 Spring 2012 Lecture 7 Jan 25, 2012 Jun Xie Finish the formulas of permutation and combination, and the examples in the last post. 2.3 Counting Techniques A little more complicated counting problem Example 22 A particular iPod playlist contains 100 songs, 10 of which are by the Beatles. Suppose the shuffle feature is used to play the songs in random order. What is the probability that the first Beatles song heard is the fifth song played? Example 23 A university warehouse has received a shipment of 25 printers, of which 10 are laser printers and 15 are inkjet models. If 6 of these 25 are selected at random to be checked by a particular technician, what is the probability that exactly 3 of these selected are laser printers (so that the other 3 are inkjets)? This is hypergeometric distribution that we’ll talk about more in Chapter 3. The hypergeometric distribution can be derived by our counting techniques. 2.4 Conditional probability P ( A ) as the original, or unconditional probability, of the event A .

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern