Question

В пятых классах школы 80 человек.Из них отличники составляют 21,25%.В шестых классах 90 человек.Отличники составляют 20%.В каких классах больше отличников и на сколько человек?СРОЧНО

Answer 1

!1) 80*0,2125=17(отл)
2) 90*0,2= 18(отл)
3) 18-17=1( больше на 1 человека )
 ответ : в 6 отличников больше чем в 5 на 1 человека

Answer 2

Analysis of the given information

According to the information provided, there are 80 students in the fifth grade, and the percentage of excellent students is 21.25%. In the sixth grade, there are 90 students, and the percentage of excellent students is 20%. We need to determine in which grade there are more excellent students and by how many.

Calculation

To find out which grade has more excellent students, we need to compare the number of excellent students in each grade.

In the fifth grade: - Total number of students: 80 - Percentage of excellent students: 21.25%

To calculate the number of excellent students in the fifth grade, we can use the formula:

Number of excellent students in the fifth grade = (Percentage of excellent students / 100) * Total number of students in the fifth grade

Substituting the values:

Number of excellent students in the fifth grade = (21.25 / 100) * 80 = 17

In the sixth grade: - Total number of students: 90 - Percentage of excellent students: 20%

To calculate the number of excellent students in the sixth grade, we can use the same formula:

Number of excellent students in the sixth grade = (Percentage of excellent students / 100) * Total number of students in the sixth grade

Substituting the values:

Number of excellent students in the sixth grade = (20 / 100) * 90 = 18

Answer

Based on the calculations, there are more excellent students in the sixth grade compared to the fifth grade. The sixth grade has 18 excellent students, while the fifth grade has 17 excellent students. Therefore, there is a difference of 1 excellent student between the two grades.