, therefore,

(Find 3 points for frequency and 3 points for drawing)

(Ⅱ) .

This problem is mainly about the application of histogram, the solution of stratified sampling problem and the calculation of classical probability.

(1) According to the frequency expressed by the area, the frequency containing the fraction is:

Then we can know the conclusion.

(2) According to the meaning of the question, the number of people in the score section is: people; The number of people divided into sections is: people;

∵ Take a sample with a capacity of, analyze the total test space and the number of events of event A, and then combine it with the classical probability formula.

Solution: (i) The frequency containing fractions is:

, therefore,

As shown in the figure:

? ..... 6 points

(Find 3 points for frequency and 3 points for drawing)

(2) According to the meaning of the question, the number of people in the score section is: people; ? ..... 8 points

The number of people in the score segment is: people; ..... 10 point

* Conduct a sample survey of students,

∴ Fraction section: Choose 2 people and record them as: Select 4 people from the fraction segment, and write it down as: Suppose any person is selected from the sample, and at most 1 person is the event of the fraction segment, then the basic events contained in the basic event space are:,,,,,, What is your evaluation of this answer? Put away comments//high quality or satisfaction or special types or recommended answers dottimewindow.iperformance & window.iperformance.mark ('c _ best',+newdate); Lawyer recommendation service: If your problem has not been solved, please describe your problem in detail and provide free professional consultation through Baidu Law Professional Edition. _ 1 uevpeq { zoom: 1； Background color: # fff border: 0; margin-bottom: 10px； Fill: 30px 0 20px 42px Location: Relative. _ 1 uevpeq . EC- 184 1 { padding:20px 0 }。 _ 1 uevpeq . 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