The following table shows the scores of 40 students in a class who participated in the math competition. If the average class score is 2.5, how many people get 3 points and 5 points respectively?
The sum of the products of each score and the corresponding number of people is 40×2.5= 100, right? Known as 0× 4+1× 7+2×10+4× 8 = 55, the sum of the other two terms should be 45. Because the number of people is only an integer, the minimum is 0. Assume that the number of people who get 5 points is 0, and the number of people who get 3 points is 45÷3= 15. If. . Just try one by one in turn, from 0 to 9, there should be multiple answers.