9. In a class of 10 students, 6 are excellent students. From the list, 7 students are randomly selected. Find the probability that among the selected students, there will be exactly 4 excellent students.
Problem 606
Official solution
9. In a class of 10 students, 6 are excellent students. From the list, 7 students are randomly selected. Find the probability that exactly 4 of the selected students will be excellent students.
Answer: 0.5