Problem Solving

试题详情

题目:

In a survey, 2,500 executives were each asked whether they read Newsletter A or Newsletter B. According to the survey, 55 percent of the executives read Newsletter A, 62 percent read Newsletter B, and 37 percent read both Newsletter A and Newsletter B.  How many of the executives surveyed read neither Newsletter A nor Newsletter B?

选项:

A、425
B、500
C、600
D、675
E、750

答案:

B

提问:

忘记了全集的公式,麻烦老师讲一下。
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