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What is probability?

Chance experiments

Some examples of chance experiments include the toss of a coin, a spin of a four-coloured spinner or the rolling of a six-sided die. (The plural of die is dice.)


Two ten-cent coins, one showing heads, one showing tails.

For the roll of a six-sided die there are six outcomes: we can roll a 1, 2, 3, 4, 5 or a 6. The outcomes are 1, 2, 3, 4, 5 or 6.

For one toss of a coin, the two outcomes are 'heads' or 'tails'.

For a four-coloured spinner such as the one pictured, the outcomes for one spin are orange, red, green or blue.

Four coloured spinner.
Detailed description

If you planted 12 seeds, one in each compartment of a 12-egg egg carton, and were interested in which seed sprouted first, there are 12 outcomes.