Dice simulator and probability lab v0.1.0
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Roll one to four dice and graph the sums as they come in. See which sum comes up most, and why.
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How to use it
- Choose how many dice: 1, 2, 3 or 4.
- Press Roll once and add up the dice. Do it a few times.
- Press Roll 100 or Roll 1,000 and watch the graph take shape.
- Compare the bars with the dashed lines, which show the expected chance of each sum.
Ideas for class
- Ask the class what sum of two dice comes up most. Write guesses down, then roll 1,000.
- Make a table of the 36 ways two dice can land and match it to the graph.
- Roll one die 10 times and then 1,000 times. Which graph is flatter?
- Play a game: your team wins on 6, 7 or 8, mine on 2, 3, 4, 10, 11 or 12. Is it fair?
- Use 3 and 4 dice to see the graph become a hill.
Related
Questions
Why is 7 the most common sum of two dice?
There are six ways to make 7 (1+6, 2+5, 3+4 and the swaps) and only one way to make 2 or 12.
Is it fair?
Yes. Each die face has the same chance on every roll, drawn fresh by your browser.
Is anything saved or sent?
No. Counts stay in this tab.
Nothing you do here is sent to us. Names, lists and settings stay in this browser. No sign-in, no ads. What each tool stores