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作者从互斥事件的概率加法公式,相互独立事件同时发生的概率公式和等可能性事件的概率公式的运用入手,因例说理,阐述了理解公式内涵对避免错用公式的重要性。
The author starts with the probability addition formula of mutually exclusive events, the probability formulas of simultaneous independent events and the probability formulas of equal possibility events, and expounds the importance of understanding the connotation of formulas to avoid the misuse formulas.