"Knowledge changes fate, and science and technology prosper the motherland". Primary and secondary schools in our city hold a science and technology sports meeting every year. The picture below shows

"Knowledge changes fate, and science and technology prosper the motherland". Primary and secondary schools in our city hold a science and technology sports meeting every year. The picture below shows that a school in our city participated in science and technology in 2009. (1) According to the bar chart, the number of participants in the car model and modeling competition of this school is 4 and 6 respectively;

(2)6÷25%=24, (24-6-6-4) ÷ 24× 360 = 120 ( 1), ***2),

(3) A 1, A 2, A 3 and A 4 respectively represent four male students, and B 1 and B 2 respectively represent two female students. The list is as follows:

* * * There are 30 equal possible outcomes, one male and one female has 16.

∴ The probability that it happens to be a man and a woman is P = 1630 = 8 15.

So the answer is: 4, 6; 24, 120 .

first

result

Second a1A 2 A 3 a4 b1b2a1a2, A 1 A 3, A 1 A 4, A 1 B 1 B2, a/kloc-0. A 2 A 4、A 2 B 1、A 2 B 2、A 2 A 3 A 4 A 1，A 4 A 2，A 4 A 3，A 4 B 1，A 4 B 2，A 4 B 1 A 1 A 2，B 1 A 3，B 1 A 4，B 1 B 2，B 1 B 2