Probability - meaning and definition. What is Probability
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What (who) is Probability - definition

MEASURE OF THE EXPECTATION THAT AN EVENT WILL OCCUR OR A STATEMENT IS TRUE
Probality; Probabilistic; Probabilities; Probability calculus; Improbability; Probability.; Probable; Propability; Forward probability; Applications of probability theory
  • Carl Friedrich Gauss
  • [[Gerolamo Cardano]] (16th century)
  • [[Christiaan Huygens]] published one of the first books on probability (17th century)
  • The probabilities of rolling several numbers using two dice.

Probability         
·noun That which is or appears probable; anything that has the appearance of reality or truth.
II. Probability ·noun The quality or state of being probable; appearance of reality or truth; reasonable ground of presumption; likelihood.
III. Probability ·noun Likelihood of the occurrence of any event in the doctrine of chances, or the ratio of the number of favorable chances to the whole number of chances, favorable and unfavorable. ·see 1st Chance, ·noun, 5.
probability         
n.
1.
Likelihood, presumption, appearance of truth, fair chance, favorable chance.
2.
Verisimilitude, likeliness, credibleness.
probability         
n. in all probability

Wikipedia

Probability

In science, the probability of an event is a number that indicates how likely the event is to occur. It is expressed as a number in the range from 0 and 1, or, using percentage notation, in the range from 0% to 100%. The more likely it is that the event will occur, the higher its probability. The probability of an impossible event is 0; that of an event that is certain to occur is 1. The probabilities of two complementary events A and B – either A occurs or B occurs – add up to 1. A simple example is the tossing of a fair (unbiased) coin. If a coin is fair, the two possible outcomes ("heads" and "tails") are equally likely; since these two outcomes are complementary and the probability of "heads" equals the probability of "tails", the probability of each of the two outcomes equals 1/2 (which could also be written as 0.5 or 50%).

These concepts have been given an axiomatic mathematical formalization in probability theory, a branch of mathematics that is used in areas of study such as statistics, mathematics, science, finance, gambling, artificial intelligence, machine learning, computer science and game theory to, for example, draw inferences about the expected frequency of events. Probability theory is also used to describe the underlying mechanics and regularities of complex systems.

Examples of use of Probability
1. It assigns a probability to each one and then picks the one with the highest probability.
2. This wild scenario, therefore, is low–probability.
3. Their probability of contracting certain cancers is 40% lower and their probability of heart disease drops by 30%, it says.
4. It increases the probability of the dollar appreciating against the shekel versus the probability of the dollar continuing to weaken.
5. The probability is that violence will rise again.