Question

В 7A в классе учатся мальчики и девочки. Средний вес мальчиков класса равен 42 кг, средний вес девочек 27 кг, а средний вес ученика класса 35,5 кг. Докажите что количество мальчиков делится на 17

Answer 1

32-17*27-35'5 ещкере алмаз супер класс алмаз ♦

Answer 2

This is a math problem that requires some algebra and logic. Here is how I would solve it:

Let x be the number of boys in the class, and y be the number of girls. Then, the total number of students in the class is x + y.

The average weight of the boys is 42 kg, so the total weight of the boys is 42x kg. The average weight of the girls is 27 kg, so the total weight of the girls is 27y kg. The average weight of the student is 35.5 kg, so the total weight of the students is 35.5(x + y) kg.

Using the equation of total weight, we can write:

42x + 27y = 35.5(x + y)

Expanding and simplifying, we get:

6.5x = 8.5y

Dividing both sides by 6.5, we get:

x = 1.3077y

Since x and y are integers, this means that y must be a multiple of 13, and x must be a multiple of 17. Therefore, the number of boys is divisible by 17.

I hope this helps you understand the solution. If you want to learn more about math problems, you can check out some of the web search results I found for you . Have a nice day!