Question

В классе 3/5 всех учащихся занимаются плаванием из них 2/3 учеников занимаются лёгкой атлетикой Сколько всего учеников в классе если лёгкой атлетикой занимается 12 учеников Дам 18 баллов как вчера​

Answer 1

12 : 2/3 = 18 - в плаванье и легкой атлетике вместе

18 :  3/5 = 30 - учеников в классе

Ответ : в классе 30 учеников

Отметь как лучший плз <3

Answer 2

Solution

To solve this problem, we can use the information provided to calculate the total number of students in the class.

Let's denote: - Total number of students in the class as T - Number of students doing swimming as (3/5)T - Number of students doing both swimming and athletics as (2/3)(3/5)T - Number of students doing only athletics as 12

We can use this information to find the value of T.

Calculation

Given: - Number of students doing only athletics = 12 - Number of students doing both swimming and athletics = (2/3)(3/5)T

We can use the fact that the total number of students doing athletics is the sum of those doing only athletics and those doing both swimming and athletics.

So, the total number of students doing athletics = Number doing only athletics + Number doing both swimming and athletics

Let's calculate the total number of students doing athletics: - Total number of students doing athletics = 12 + (2/3)(3/5)T

Now, we can use the given information that the total number of students doing athletics is equal to 12 to solve for T.

Solving for T

We can set up the equation: - Total number of students doing athletics = 12 - 12 + (2/3)(3/5)T = 12

Solving for T: - **(2/3)(3/5)T