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For a discrete distribution, if n trials are carried out and if x of them are favourable to the event that you are interested in, then the probability is x/n. Note that it may be possible to work out n and x on theoretical grounds rather than actually doing the experiment.
The formula gets more complicated for continuous variables. For continuous variables, it is the area under the probability density curve over the domain of interest.
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What is the official formula for probability?
The official formula for probability is x/y.
What is the formula for figuring how many studs in a wall?
[(Linear feet x 12) / 16] + 1 is the formula.
What is the formula for an octagon?
There is no formula for an octagon. There are formulas for figuring out different aspects of an octagon, such as its perimeter, diameter, etc.
What is the formula for probability when you don't know the outcome?
It is the probability distribution function that is relevant for the experiment.
What is the formula for figuring percentage?
X as a percentage of Y = 100*X/Y.
