Tossing Two Dice

On the first roll in the casino game of CRAPS, rolling a sum of 2, 3, or 12 is called "craps" and is an automatic loser. Rolling a sum of 7 or 11 is called a "natural" and a automatic winner.

The probability of rolling craps is 4/36 or 1/9 or 0.1111. The probability of rolling a natural is 8/36 or 2/9 or 0.2222.

This experiment determines if these mathematical probabilties hold true by rolling 2 dice up to 1,000,000 times. Choose how many times you want to toss.

Each time you press the "TOSS" button, 2 dice will be rolled that many times. Experiment results approach mathematical probability when the number of trials is very high.

Enter Number of Tosses: (1 - 1000000).