Question

У класi 32 учня. з них 17 вiдвiдують гурток iнформатики, 20 - грають у шахи, 5 учнiв не вiдвiдують цi гуртки. скiльки дiтей вiдвiдують i гурток з шахiв i гурток iнформатики?

Answer 1

Всего 32 уч.
17 інформатика
20 шахи
5 не відвідують

в класі 32 і 5 учнів не ходять, виходить , що 27 учнів ходять до гуртків
17 +20 =37
37 - 27= 10 учнів відвідують інформатику і шахи
Відповідь : 10 учнів

Answer 2

Analysis and Solution

To determine the number of students who attend both the chess club and the computer science club, we need to consider the given information.

Let's break down the information provided:

- There are 32 students in the class. - 17 students attend the computer science club. - 20 students play chess. - 5 students do not attend any clubs.

We can use this information to calculate the number of students who attend both the chess club and the computer science club.

Calculation

To find the number of students who attend both clubs, we need to subtract the number of students who do not attend any clubs from the total number of students.

Total number of students = 32 Number of students who do not attend any clubs = 5

Therefore, the number of students who attend at least one club = 32 - 5 = 27.

Now, let's calculate the number of students who attend both clubs.

Number of students who attend the computer science club = 17 Number of students who play chess = 20

Since the total number of students who attend at least one club is 27, we can subtract this number from the sum of the number of students who attend the computer science club and the number of students who play chess to find the number of students who attend both clubs.

Number of students who attend both clubs = (17 + 20) - 27 = 37 - 27 = 10.

Answer

Therefore, 10 students attend both the chess club and the computer science club.