Difference between revisions of "Some Probability Formulas"
Ciskowskid (talk | contribs) (Created page with "== Some useful probability formulas == '''The Addition Rule''' Consider 2 events, ''A'' and ''B''. To find the probability that either ''A'' or ''B'' (or both) will occur, w...") |
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| + | We subtract the probability of both ''A'' and ''B'' occurring, as to not "double count" them. This can seen better by looking at the following Venn Diagram: | ||
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| + | [[File:A_and_B_Venn_Diagram.JPG]] | ||
Revision as of 11:06, 11 February 2022
Some useful probability formulas
The Addition Rule
Consider 2 events, A and B. To find the probability that either A or B (or both) will occur, we can use the following formula, called the addition rule:
We subtract the probability of both A and B occurring, as to not "double count" them. This can seen better by looking at the following Venn Diagram:
