Likelihood scale Probability scale Single events Events with two parts Probability and risk Lottery winner
 What is the probability of throwing two numbers the same? Dice have six sides and there is a probability of 1 in 6 (1/6) of throwing any particular number. So what is the chance of throwing a 5 and 3 at the same time? Click for the answer.

 Theory and practice It is unlikely that you found that it took exactly 18 rolls to get a 5 and a 3. That is because the theoretical probability of 1 in 18 would only be achieved if you took an average of hundreds of rolls. It is important to remember that theoretical probabilities will only be a good indication of real life when many hundreds or thousands of examples have been looked at.

 Observed probabilities Experimenters make tests to prove or disprove a theory. Will this experiment give the theoretical probability for throwing a 5 and 3? Click the button to throw the dice or click for a text description. Count how many attempts it takes to throw a 5 and 3. Repeat the experiment to see if you get this result each time. You have found the experimental probability.