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生物概率的计算在高考中既是重点又是难点,很多学生难以掌握,现从数学概率知识来阐述。我们在数学中都学过概率的加法公式和乘法公式,所谓概率的加法公式指两个或多个互斥事件有一个发生的概率,用加法公式。如A和B互斥,则P(A∪B)=P(A)+P(B)。概率的乘法公式指两个或多个相互独立事件同时发生的概率,用乘法公式。如A和
The calculation of biological probability is both a key and a difficult point in the college entrance examination. Many students are difficult to master and are now elucidated from mathematical probabilistic knowledge. In mathematics, we have all learned the addition and multiplication formulas of probabilities. The addition formula of probabilities refers to the probability of two or more mutually exclusive events occurring, using the addition formula. If A and B are mutually exclusive, then P(A∪B)=P(A)+P(B). The multiplication formula for probability refers to the probability that two or more independent events occur at the same time, using a multiplication formula. Such as A and