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SAT考试数学高频题型单项练习题4

2019年04月26日 14:27:57来源:SAT考试网
导读:数学在大家看来一直是理科生应该重点学习的内容,但是在SAT考试里,大家要做到全面发展,所以不管是不是自己喜欢的科目,我们都要去练习,现在就跟着小编一起做下面的习题吧!

>>2019年SAT考试:SAT考试数学高频题型单项练习题4

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1. Amy has to visit towns B and C in any order. The roads connecting these towns with her home are shown on the diagram. How many different routes can she take starting from A and returning to A, going through both B and C (but not more than once through each) and not travelling any road twice on the same trip?

A. 10

B. 8

C. 6

D. 4

E. 2

9.Correct Answer: B

Explanation:

Amy can travel clockwise or anticlockwise on the diagram.

Clockwise, she has no choice of route from A to B, a choice of one out of two routes from B to C, and a choice of one out of two routes from C back to A. This gives four possible routes.

Similarly, anticlockwise she has four different routes.

Total routes = 8

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