Post7 - STAT 511-2 Spring 2012 Lecture 7 Jun Xie Finish the formulas of permutation and combination and the examples in the last post 2.3 Counting

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

View Full Document Right Arrow Icon
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
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/20/2012 for the course STAT 511 taught by Professor Bud during the Fall '08 term at Purdue University-West Lafayette.

Page1 / 2

Post7 - STAT 511-2 Spring 2012 Lecture 7 Jun Xie Finish the formulas of permutation and combination and the examples in the last post 2.3 Counting

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online