Campus fan slogan

( 1)200, 15; (2) See supplementary picture analysis; (3)450.

Test analysis: (1) Use the number of people and the percentage of literature to find the total number of people, and use integer 1 to subtract the percentage of literature, popular science and military to find the value of m;

(2) Multiply the percentage of popular science by 200 to find out the number of popular science, and then complete the statistical chart;

(3) Multiply the number of books read after class by the percentage of popular science to get the answer.

Problem analysis: (1) The number of students in this survey =200 (persons).

The percentage of military affairs in the departmental statistical chart is:1-35%-20%-30% =15%.

Then m =15;

(2) The number of popular science students is: 200×30%=60 (people),

Supplementary pictures are as follows:

(3) According to the meaning of the question: 1500× =450 (volume),

A: It is more appropriate to add 450 popular science books.

Test center 1. Bar chart; 2. Estimate the population with samples; 3. Fan map.