Question

Решите задачу*: «В школе занимаются 100 человек. Из них 63 человека ходят в кружок пения, а 87 в кружок танцев. 61 человек ходят в оба кружка. Сколько человек не ходят на эти кружки?»

Answer 1

Только пением занимются 63-61=2 чел
Только танцами занимаются 87-61=26 чел
 И пением, и танцами занимаются  61 чел.
Всего в ркужнах занимаются 61+2+26=89 человек.
Не ходят в эти кружки 
100-89=11 человек. 
Задачу можно решить и с помощью кругов Эйлера. ( См. вложение)

Answer 2

Problem Analysis

We are given that there are 100 people in a school. Out of these, 63 people attend a singing club, 87 people attend a dance club, and 61 people attend both clubs. We need to find the number of people who do not attend either of these clubs.

Solution

To find the number of people who do not attend either the singing club or the dance club, we can subtract the number of people who attend both clubs from the total number of people in the school.

Let's calculate the number of people who do not attend either club:

Total number of people in the school = 100 Number of people who attend both clubs = 61

Number of people who do not attend either club = Total number of people - Number of people who attend both clubs

Number of people who do not attend either club = 100 - 61 = 39

Therefore, there are 39 people who do not attend either the singing club or the dance club.

Answer

The number of people who do not attend the singing club or the dance club is 39.