**Probability**

Probability is the study of the uncertainty. The uncertainty of any doubtful situation is measured by means of Probability.

**Uses of Probability**

Probability is used in many fields like Mathematics, Physical Sciences, Commerce, Biological Sciences, Medical Sciences, Weather Forecasting, etc.

**Basic terms related to Probability**

**1. Randomness**

If we are doing an experiment and we don’t know the next outcome of the experiment to occur then it is called a **Random Experiment**.

**2. Trial**

A trial is that action whose result is one or more outcomes. Like –

- Throw of a dice
- Toss of a coin

**3. Independent trial**

A trial will be independent if it does not affect the outcome of any other random trial. Like throwing a dice and tossing a coin are independent trials as they do not impact each other.

**4. Event**

While doing an experiment, an event will be the collection of some outcomes of that experiment.

**Example** If we are throwing a dice then the possible outcome for even number will be three i.e. 2, 4, 6. So the event would consist of three outcomes.

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