Probability

3. Equally likely outcomes are two or more results that have the same chance of occurring.
5. If an experiment was performed and an event did not occur, then the complement definitely occurred.
6. If all the outcomes in the sample space are divided into two events, they are complementary events.
9. When an experiment is performed one or more times, each occurrence is called a trial. The example given indicates 50 trials of a single-step experiment.
11. Events are non-mutually exclusive if they share one or more outcomes. In the given example, the outcome 5 is shared.
12. The probability is 50% or 0.5 or 21
13. Outcomes are favourable if they are part of some desired event.
14. The sum of the probabilities of all the outcomes of a chance experiment is 1 (or 100%).
15. The probability is 0% or 0.
16. The probability is 100% or 1.
17. A chance experiment is an activity that may produce a variety of different results which occur randomly. The example given is a single-step experiment.
18. found using a large number of trials. This is called the experimental probability. If the number of trials is large, the experimental probability should be very close to that of the theoretical.

1. Sometimes it is difficult or impossible to calculate a theoretical probability, so an estimate can
2. The sample space is the set of all possible outcomes of an experiment. It is usually written inside braces, as shown in the example.
4. An outcome is one of the possible results of a chance experiment.
7. Two or more events are mutually exclusive if they share no outcomes.
8. A compound event is a collection of two or more outcomes from the sample space of a chance experiment.
9. Probabilities can be expressed as fractions, decimals and percentages.
10. An event is either one outcome or a collection of outcomes. It is a subset of the sample space.