Probability = chance of an event happening. P(event) = favourable outcomes / total outcomes. P(value) is between 0 and 1. P=0 means impossible. P=1 means certain. Example: tossing a coin: P(head) = 1/2. Rolling a die: P(getting 3) = 1/6. P(getting even number) = 3/6 = 1/2.
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