Test analysis: (1) Since the sum of the areas of all small rectangles in the diagram is equal to 1,

So ... ? ..... 2 points

Solve. ? ..... 3 points

(2) According to the frequency distribution histogram, the frequency score is not less than 60 points.

For ...? ..... 5 points

Because there are 640 students in Grade One of our school, we use samples to estimate the overall thinking.

It can be estimated that the number of students with at least 60 points in mathematics in Grade One of this school is about 6 points.

(3) The number of people with scores in the score section is, ...? ..... 7 points

The number of people with scores in the score section is people, and it is recorded as,,, ... 8 points respectively.

If two students are randomly selected from students whose math scores are less than two,

Then all the basic events are:,,,,

, , , , , , , ,

? *** 15 species. ..... 10 point

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