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一、从学生的作业谈起题目一只蚂蚁在如图1所示的树枝上寻觅食物(A、B),假定蚂蚁在每个岔路口都会随机地选择一条路径,它获得食物的概率是多少?这是一道人教版教材中的习题.多数学生作业中的做法为:图中共有7个树枝,其中有2个树枝上有食物,因此蚂蚁获得食物的概率为2
First, from the student’s homework on the subject An ant looks for food (A, B) on the branch as shown in Figure 1, assuming that the ants at each fork will be randomly selected a path, it is the probability of access to food is This is a PEP teaching material exercises.Most students practice practice: the figure of a total of seven branches, of which there are two branches of food, so the probability of ants getting food is 2