急= 口=!明天要交的.

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/07/08 12:40:01

急= 口=!明天要交的.
The following pie chart shows the grades obtained by a group of students in a Mathematics public examination.
附图：

（a）If there are 8 students obtaining grade F,how many students are there in this group?
（b） Which grade do most of the students obtain?How many students obtain that grade?
(c) How many students obtain grade A,grade B or grade

（a）F=1-15%-17.5%-10%-10%-27.5%=20%
8/20%=40
so there are 40 students in this groups
（b）E 27.5%*40=11
c) grade A 15%*40=6
grade B 17.5%*40=7
grade C 10%*40=4

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