Dice Probability

Class 9–10 Maths: probability

Roll one die or two dice hundreds of times. Does what happens match what theory predicts?

Words to know

Probability: How likely an event is, from 0 (impossible) to 1 (certain).
Experiment: Trying something many times and recording what happens.
Outcome: One possible result, like rolling a 4.
Theoretical probability: Favourable outcomes ÷ all equally likely outcomes, like 1/6 for a six.

Answer 3 questions to check what you learned.

1. What is the probability of rolling a 6 on a fair die?

2. With two dice, which sum is most likely?

3. As you roll more times, your experimental probability usually…

Roll a real die 30 times and tally each face. Are all faces equally common? Roll 30 more and see if it evens out.