7. A high school has 20 classes, each with 40 students: 25 boys and 15 girls. If 80 students are selected from the school's 800 students using simple random sampling, which of the following statements are correct? (1) At least one student from each class will be selected (2) The number of boys selected will definitely be greater than the number of girls selected (3) Given that Xiaowén is a boy and Xiaomei is a girl, the probability that Xiaowén is selected is greater than the probability that Xiaomei is selected (4) If students A and B are in the same class, and student C is in another class, then the probability that both A and B are selected equals the probability that both A and C are selected (5) If students A and B are brothers, the probability that both are selected is less than $\frac { 1 } { 100 }$
& 45 & \multirow{4}{*}{B} & 19 & 4 & & 35 & 5
7. A high school has 20 classes, each with 40 students: 25 boys and 15 girls. If 80 students are selected from the school's 800 students using simple random sampling, which of the following statements are correct?\\
(1) At least one student from each class will be selected\\
(2) The number of boys selected will definitely be greater than the number of girls selected\\
(3) Given that Xiaowén is a boy and Xiaomei is a girl, the probability that Xiaowén is selected is greater than the probability that Xiaomei is selected\\
(4) If students A and B are in the same class, and student C is in another class, then the probability that both A and B are selected equals the probability that both A and C are selected\\
(5) If students A and B are brothers, the probability that both are selected is less than $\frac { 1 } { 100 }$