Question

В классе 32 ученика 15 девочек.10 мальчиков занимаются футболом а валейболом на один меньше. сколько мальчиков занимаются и футболом и валейболом?

Answer 1

32-15=17 (мальчиков)
10+9=19 - 19 больше 17 на 2, значит двое мальчиков занимаются и футболом и волейболом. 

Answer 2

10-1=9-мальчиков занимаются волейболом.
10+9=19-мальчиков заниматься футболом и волейболом.

Answer 3

Calculating the Number of Boys Playing Football and Volleyball

To calculate the number of boys who play both football and volleyball, we can use the information provided.

Given: - Total number of students in the class: 32 - Number of girls: 15 - Number of boys playing football: 10 - Number of boys playing volleyball: 9 (one less than the number playing football)

Calculation

We can calculate the number of boys playing both football and volleyball using the following steps:

1. Calculate the total number of boys in the class: - Total number of students: 32 - Number of girls: 15 - Total number of boys = Total number of students - Number of girls - Total number of boys = 32 - 15 = 17 2. Calculate the number of boys playing only football: - Number of boys playing football: 10 - Number of boys playing volleyball: 9 - Number of boys playing only football = Total number of boys - Number of boys playing volleyball - Number of boys playing only football = 17 - 9 = 8

3. Calculate the number of boys playing both football and volleyball: - Number of boys playing both football and volleyball = Number of boys playing football - Number of boys playing only football - Number of boys playing both football and volleyball = 10 - 8 = 2

Answer

The number of boys who play both football and volleyball is 2.