Question

В классе учатся мальчики и девочки. Вася посчитал что если каждая девочка принесёт 3 кг макулатуры,а каждый мальчик 5 кг,то все вместе соберут 122 кг макулатуры. Сколько в классе мальчиков?

Answer 1

Пусть мальчик тоже принесли по  3 кг , то
30 * 3 =90
122-90 = 32 осталось макулатуры
т.к у мальчиков есть ещё 2 кг, то
32 /2 =16 мальчиков 
30 -16 =14 девочек
Ответ 16 мальчиков

Answer 2

Calculation of the Total Weight of Paper in the Classroom

According to Vasya's calculation, if each girl brings 3 kg of paper and each boy brings 5 kg of paper, the total weight of paper collected by the class would be 122 kg.

To determine the number of boys in the class, we can set up an equation based on the given information.

Let's assume there are 'x' boys in the class. Since the number of girls is not specified, we can represent it as 'y'.

The total weight of paper brought by the girls would be 3y kg, and the total weight of paper brought by the boys would be 5x kg.

According to Vasya's calculation, the total weight of paper collected is 122 kg. Therefore, we can set up the equation:

3y + 5x = 122

To find the number of boys in the class, we need to solve this equation.

Solving the Equation

To solve the equation, we need another equation to eliminate one of the variables. Unfortunately, the given information does not provide any additional equations or constraints.

Without additional information, it is not possible to determine the exact number of boys in the class.

Therefore, based on the given information alone, we cannot determine the number of boys in the class.

Please note that this answer is based solely on the information provided and does not take into account any additional factors or constraints that may exist in the problem.