Question

В классе число отсутствующих учеников составляет 1/6 числа учеников в классе. После того как из класса вышел один ученик, число отсутствующих оказалось равным 1\5 числа всех учащихся класса. Сколько учеников в этом классе? НЕ УРАВНЕНИЕМ!!!

Answer 1

1/5-1/6=6/30-5/30=1/30
значит 1 ученик это 1/30 класса.
Получается в классе 30 учеников.

Answer 2

Problem Analysis

We are given that the number of absent students in a class is 1/6 of the total number of students in the class. After one student leaves the class, the number of absent students becomes 1/5 of the total number of students in the class. We need to find the total number of students in the class.

Solution

Let's assume the total number of students in the class is x.

According to the given information, the number of absent students in the class is 1/6 of x. This can be represented as:

Absent students = (1/6) * x

After one student leaves the class, the number of absent students becomes 1/5 of the total number of students in the class. This can be represented as:

Absent students - 1 = (1/5) * (x - 1)

We can now solve these two equations to find the value of x.

Calculation

Let's solve the equations:

(1/6) * x = (1/5) * (x - 1)

Multiplying both sides by 30 to eliminate the fractions:

5x = 6(x - 1)

Expanding the equation:

5x = 6x - 6

Bringing like terms to one side:

6x - 5x = 6

Simplifying:

x = 6

Therefore, the total number of students in the class is 6.

Answer

There are 6 students in this class.