The chance that something will happen, usually described with numbers between 0 (impossible) and 1 or 100% (certain). It is a way to measure how likely an event is.
From Latin *probabilitas* meaning 'likelihood' or 'credibility', from *probabilis* 'provable, likely'. It entered English through French, becoming a mathematical term over time.
Probability turns uncertainty into numbers, but our brains still think in stories. People fear flying more than driving even though the probability of a crash is lower, because stories of plane crashes are more vivid. Learning probability is partly learning when your intuition is lying to you.
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