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It is often represented as a number between 0 and 1, where 0 means the event will not happen and 1 means the event will certainly happen.

A playing card with the ace of clubs on it. A playing card with the ace of Hearts on it. A playing card with the ace of Spades on it. A playing card with the ace of diamonds on it. A gold coin with the letter H on it. A gold coin with the letter T on it. A blue raffle ticket. A pink raffle ticket. A purple raffle ticket.