# probability meaning

[ ˌprɔbə'biliti ] Pronunciation:   "probability" in a sentence
Noun: probability  `próbu'bilitee
1. A measure of how likely it is that some event will occur; a number expressing the ratio of favourable cases to the whole number of cases possible
"the probability that an unbiased coin will fall with the head up is 0.5"
- chance
2. The quality of being probable; a probable event or the most probable event
"for a while mutiny seemed a probability"; "going by past experience there was a high probability that the visitors were lost"

Derived forms: probabilities

Type of: amount, measure, quality, quantity

Antonym: improbability

Encyclopedia: Probability

[Economics]
The likelihood that an event or a particular result will occur. It can be represented on a scale by a number between 0 (zero probability of the event happening, i.e. it is certain not to) and 1 (certainty that it will occur). It is treated mathematically on this basis in statistics.

[Electronics]
1. The branch of mathematics concerned with the likelihood of an event’s occurrence. It has many applications in quality control and physics.
2. The mathematical likelihood that an event will occur.

[Finance]
The relative likelihood of a particular outcome among all possible outcomes.

[Medicine]
The study of chance processes or the relative frequency characterizing a chance process.

## Examples

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1. what is the probability that it is a prime?
2. a higher probability means more confidence.
3. a probability of 1 represents certainty.
4. this is often quoted above of 67% probability.
5. in all probability he is already left.