Random events and probability
Here we study patterns in experiments whose outcome cannot be predicted with certainty: coin toss, drawing a card, picking a ball from an urn.
A random event — under fixed conditions it may or may not occur.
The probability of event A is the number P(A) (from Latin *probabilitas*) that measures how likely the outcome is; in the classical model it equals m/n.
The same physical experiment can be described by different outcome sets — agree explicitly what counts as “one outcome”
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