Question

Контрольную работу писали 26 учеников. двойку никто не получил . тройку поставили 7 учащимся. остальные ребята получили пятёрки и четвёрки. пятёрок было на 9 меньше, чем четвёрок. сколько учеников проучили за контрольную работу пятерку? сколько - четверку?

Answer 1

Наверное 10 чел черверку получили.
Не знаю. .............

Answer 2

        1)26-7=19 не получили  оценку 3  
2)19-9=10(у)которые получили одинаковое кол-во 4 и 5
3)10:2=5(у) получили 5
4)5+9=14(у) получили 4
Ответ:5 учеников получили оценку  5 ; 14 учеников поучили  оценку 4  

Answer 3

Problem Analysis

We are given the following information: - 26 students wrote the test. - No one received a grade of 2. - 7 students received a grade of 3. - The remaining students received grades of 4 and 5. - There were 9 fewer grades of 5 than grades of 4.

We need to determine how many students received a grade of 5 and how many received a grade of 4.

Solution

Let's assume that the number of students who received a grade of 4 is x. Since there were 9 more grades of 4 than grades of 5, the number of students who received a grade of 5 would be x - 9.

We can set up the following equation based on the given information: x + (x - 9) + 7 = 26

Simplifying the equation: 2x - 2 = 26 2x = 28 x = 14

Therefore, 14 students received a grade of 4, and 14 - 9 = 5 students received a grade of 5.

Answer

Based on the given information, 5 students received a grade of 5, and 14 students received a grade of 4.