(3)207

Test analysis: (1) 50; 0.04; 0. 10 ...6 points

(2) As shown in the figure.

? ..... 10 point

(3) Among the randomly selected students, qualified students 10.

A: About 207 students got the qualification ... 14 points.

Comments: In item (1) of this question, the sum of frequencies in the frequency distribution table is 1, and then the frequency is obtained according to the proportional relationship, and the map can be successfully completed according to these two data.