Question

В классе каждый мальчик дружит с тремя девочками, а каждая девочка - с пятью мальчиками. Известно, 17 учеников этого класса любят играть в баскетбол и что в классе 15 парт. Сколько всего ребят в классе?

Answer 1

30 человек. Вроде бы
Но я не уверена

Answer 2

Problem Analysis

We are given the following information: - Each boy in the class is friends with three girls. - Each girl in the class is friends with five boys. - There are 17 students in the class who love playing basketball. - There are 15 desks in the class.

We need to determine the total number of students in the class.

Solution

Let's assume there are b boys and g girls in the class.

From the given information, we can write two equations: 1. The total number of boys in the class is equal to the number of girls multiplied by 3: b = 3g. 2. The total number of girls in the class is equal to the number of boys multiplied by 5: g = 5b.

To solve these equations, we can substitute the value of g from equation 2 into equation 1: b = 3(5b).

Simplifying the equation, we get: b = 15b.

Dividing both sides by b, we get: 1 = 15.

This equation is not possible, which means there is no solution that satisfies the given conditions.

Therefore, there is no valid answer to the question "How many students are there in the class?".

Please let me know if there is anything else I can help you with!