Question

В классе 25человек.Теннисом занимаются 14человек,футболом 20человек.Сколько занимаются теннисом и футболом?

Answer 1

1) 14+20=34 (ч.)
2) 34-25=9 (ч.)
Ответ: 9 Человек занимаются теннисом и футболом.

Answer 2

1)14+20=34 - занимаются вместе
2)34-25=9 - занимаются и тем и тем
3)14-9=5 - занимаются теннисом
4)20-9=11 - занимаются футболом

Answer 3

Calculating the Number of People Engaged in Tennis and Football

In the class of 25 people, 14 people are engaged in tennis, and 20 people are engaged in football. We can calculate the number of people engaged in both tennis and football by using the provided information.

To calculate the number of people engaged in both tennis and football, we can use the principle of inclusion-exclusion. This principle states that to find the total count of elements in two sets, we can add the number of elements in each set and then subtract the number of elements in their intersection.

Using this principle, we can calculate the number of people engaged in both tennis and football as follows:

1. Total people engaged in tennis and football = Total people engaged in tennis + Total people engaged in football - Number of people engaged in both tennis and football 2. Total people engaged in tennis and football = 14 + 20 - Number of people engaged in both tennis and football

Let's calculate the number of people engaged in both tennis and football using the provided information.

1) 14 + 20 = 34 2) 34 - 25 = 9

The number of people engaged in both tennis and football is 9.

Conclusion

In a class of 25 people, 9 individuals are engaged in both tennis and football.