选择题
2019 AMC 8 Problem 11: Math and Language Class
The eighth grade class at Lincoln Middle School has 93 students. Each student takes a math class or a foreign language class or both. There are 70 eighth graders taking a math class, and there are 54 eighth graders taking a foreign language class. How many eighth graders take only a math class and not a foreign language class?
2019 AMC 8 第11题：数学和语言课
林肯中学八年级有 93 名学生。每个学生都参加数学课或外语课或两者都参加。八年级学生有 70 人上数学课，八年级学生有 54 人上外语课。有多少八年级学生只上数学课而不上外语课
A.
16
B.
53
C.
31
D.
39
E.
70