大门|大门-CS-2014-（第三组）|问题65

下表列出了有关学生考试成绩的问题数据。还列出了每个问题的分数。考试没有负面或部分分数。 这个班在考试中的平均分数是多少 （A） 1.34 （B） 1.74 （C） 3.02 （D） 3.91 答复: （C） 说明：

As you can see from each row that the total number of
students in the class are 44.

Now we have to find the total number of marks obtained
by the class.

Marks are given for correct answers only. 
No negative or partial marking.

For 1st question total marks obtained are : 2*21 = 42
For 2nd question total marks obtained are : 3*15 = 45
For 3rd question total marks obtained are : 2*23 = 46

hence total marks obtained by the class are = 42+45+46 = 133

Now, Average marks obtained = Total Marks/Total no of students
= 133/44
= 3.02
Hence C is the answer.

这个问题的小测验