Friday

January 30, 2015

January 30, 2015

Posted by **ryan** on Saturday, May 1, 2010 at 4:16pm.

- Probability -
**bobpursley**, Saturday, May 1, 2010 at 4:28pmPr(7 right, 13 wrong)= .25^7 * .75^13 * number of ways

the number of ways is 20!/(7!13!)

((20 !) / ((7 !) * (13 !))) * (.25^7) * (.75^13) = 0.112406195

check my thinking.

- Probability -
**SraJMcGin**, Saturday, May 1, 2010 at 4:44pmAnd here are some probability tutorials you might find handy:

http://search.yahoo.com/search?fr=mcafee&p=probability+tutorial

Sra

**Answer this Question**

**Related Questions**

Stats - You are taking a multiple choice test that has 20 questions with 4 ...

statistics - A multiple choice test has 20 questions with each having 4 possible...

statistics - A test consists of 12 multiple choice questions with 5 choices for...

Stats - An instructor gives a test with 20 multiple choice questions. There are ...

Statistics - A multiple choice test has five choices. Therefore the probability ...

statistics - Test consist of 10 multiple choice questions each having 4 possible...

Statistics - A multiple choice test consists of 60 questions. Each question has ...

statistics - A student is taking a multiple choice test where each question have...

statistics - 10. A student is taking a multiple choice test where each question ...

math-Probablity - A student is writing a multiple choice test consisting of 40 ...