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人教A版必修3第三章《概率》的课后习题(第142页3.3B组第2题)中有这样一道题:若P(A∪B)=P(A)+P(B)=1,则事件A与B的关系是()(A)互斥不对立(B)对立不互斥(C)互斥且对立(D)以上答案都不对对这道题的答案广大中学教师颇有争议,认为选(C)答案的居多.教师用书给出的答案是(D),但没做任何解释.教师在处理这道习题时多
People teach A version compulsory 3 Chapter “Probability” after-school exercise (page 142 3.3B group 2) there is such a problem: If P (A ∪ B) = P (A) + P (B) = 1, the relationship between events A and B is () (A) mutually exclusive opposite (B) opposite non-mutually exclusive (C) mutually exclusive and opposite (D) the above answer is not right answer to this question The majority of high school teachers Quite controversial, that the majority of (C) answer the answer. Teacher’s book gives the answer (D), but did not explain. The teacher in dealing with this problem more