Above the sunshine classroom of mathematics .....

(1) pet-name ruby, hello:

1, junior college or above includes junior college and undergraduate course, so it accounts for (40+55)%=95%.

2, that is, 84 people are 35 percentage points more, so the total number is. 84/(35%)=240, so there are undergraduates, 240*40%=96, junior college students, 240*55%= 132, high school students, 240-96- 132= 12.

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