AMC 8 2019 Problem 11
AMC8 2019 年第 11 题
基本计数原理★★★☆☆
The third-grade class at Lincoln Elementary School has 93 students. Each student takes a math class or a foreign language class or both. There are 70 third graders taking a math class, and there are 54 third graders taking a foreign language class. How many third graders take ''only'' a math class and ''not'' a foreign language class?
林肯中学的八年级总共有 93 个学生。每个学生都会上一门数学课或者一门外语课或者两者都上。已知有 70 个八年级学生上一门数学课，54 个八年级学生上一门外语课。问有多少个八年级学生只上数学课而不上外语课？
- A.16
- B.23
- C.31
- D.39
- E.70
正确答案 · Correct Answer
D
解析 · Solution
解析整理中
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