ex_0523 - The fundamental counting principle This principle...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
The fundamental counting principle This principle states that "If there are r ways to do one thing, and s ways to do another, and t ways to do a third thing, and so on . .., then the number of ways of doing all those things at once is r x s x t x . .." Let's look at an actual example and try to make sense of this rule. How about a license plate. .. How many different license plates are there altogether? Look at what's used to make a plate: LETTER LETTER LETTER NUMBER NUMBER NUMBER For each of the letters we have 26 choices. For each of the numbers we have 10 choices. The number of ways to pick the first letter The number of ways to pick the second letter The number of ways to pick the third letter The number of ways to pick the first number The number of ways to pick the second number The number of ways to pick the third number 26 26 26 10 10 10 The Fundamental Counting Principle says that: The total number of ways to fill the six spaces on a licence plate is 26 x 26 x 26 x 10 x 10 x 10 which equals 17,576,000 Exercise on May23
Background image of page 1

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

View Full DocumentRight Arrow Icon
1. Binomial settings. Which of the following random variables describe a binomial random variable? A) X is the number of girls born out of the next 20 children at a local hospital.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/27/2008 for the course BCOR 1020 taught by Professor Liang,fang during the Summer '07 term at Colorado.

Page1 / 6

ex_0523 - The fundamental counting principle This principle...

This preview shows document pages 1 - 3. Sign up to view the full document.

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