Related ImageEveryone has a photographic memory. Some don't have film.
spc Bd 1 Bd 3
 
Share This Page

Math Puzzle Answer

You have found the solution to one of our math puzzles. There are several other puzzles to enjoy. Please click to see all our math puzzles.

 

Related Image

Game of Craps - Answer

The number of rolls of the dice you can expect in a game of craps is 3.376. Here's the solution:

The frequency (F) of each number (N) rolled is F(N) = (6 - lN - 7l) / 36.

Of all 36 possibilities, the 12 which have an N of 2, 3, 7, 11, or 12 end on the first roll.

For other values or N, the probability of ending on the next roll is P(N) = F(N) + F(7). So the expected number of rolls after the first roll for these values of N is 1 / P(N).

For all possibilities, the expected number of rolls is
E =
1 + ∑(F(N)/P(N)) = 1 + 2(3/9 + 4/10 + 5/11) = 557/165 = 3.376.

 

Home Brain Teasers Cryptic Math Puzzles Logic Puzzles Math Puzzles Hard Math Puzzles Word Picture Puzzles

Logic Games


Play Mastermind Same Game Play ShisenSho

Other Games


Car Games Skiing Games Football Games Free Kid Puzzles Magic Grid Game
Dog Jokes Funny Blonde Jokes I have Learned...
Astroid Games Play Tic-Tac-Toe Play Kuzushi Play 3D Driver Wermz Online Game Antaris Free Game
How Stereograms Work Optical Illusions Visual Optical Illusions

Fun
Optical Illusions

We have free optical illusions, 3D illusions, real illusions, cool illusion and more.
Get the Explanation
for this
Optical Illusion
Our Site Map Some Related Links Link To Us Send This To A Friend Comments/Suggestions
Report A Broken Link Contact Information















B7
 
Brain-Fun.com

Site Map | Terms of Use | Privacy & Security | Contact Us | Purchase Agreement | Send Feedback
Brain Teasers, Logic Puzzles, and other Fun Brain Activities
© 1996-2005 by Brain-Fun.com All Rights Reserved.