Probability is a method of expressing information or principle that an event will occur or has occurred. In mathematics the ideas has given a correct meaning in probability theory is used widely in the areas of study as mathematics, statistics, science, and finance to depict conclusions about the possibility of potential events .An event is a group of possible outcomes.
A simple event in a probability is the event of a single outcome.
Simple Event
The simple event is as follows:
If we bring together a deck of 52 playing cards and no jokers, and pick a single card from the deck, then the sample space is a 52-element set, as each individual card is a possible outcome.
An event is any subset of the sample space, as well as any single-element set, the empty set and the sample space itself which is defined to have chance one.
Further events are correct subsets of the sample space that surround multiple elements. So, for example, potential events include:
Black and red at the same time without being a joker (0 elements),
The five of Diamond(1 element),
A Queen(4 elements),
A Face card(12 elements),
A Spade (13 elements),
A card(52 elements).
Seeing as all events are sets, they are generally written as sets (e.g. {1, 2, 3}), and symbolized graphically using Venn diagrams. Venn diagrams are mainly useful for symbolizing events because the probability of the event can be identified with the ratio of the area of the event and the area of the sample space.
Example:
The event that 1 roll a 7 with two dice is an event.
But the event that 1 roll snake-eyes (1 and 1) is a simple event.
A complementary event is just the opposite of an event.
The balancing event to rolling a 7 is the event that 1 do not roll a seven. It consists of all the outcomes not in the unique event.
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