Question

В классе 22 человека занимаются английским языком а 9 человек - французским. Трое учеников при этом изучают оба языка. Сколько учеников в классе, если известно, что каждый изучает хотя бы один язык

Answer 1

22+9+3=34
Не уверенна, но кажется так

Answer 2

Problem Analysis

We are given that there are 22 students studying English and 9 students studying French in a class. Additionally, 3 students are studying both languages. We need to determine the total number of students in the class who are studying at least one language.

Solution

To solve this problem, we can use the principle of inclusion-exclusion. We start by adding the number of students studying English and the number of students studying French. However, we need to subtract the number of students studying both languages to avoid double counting. The formula for this is:

Total number of students = Number of students studying English + Number of students studying French - Number of students studying both languages

Let's calculate the total number of students in the class:

Number of students studying English = 22 Number of students studying French = 9 Number of students studying both languages = 3

Total number of students = 22 + 9 - 3 = 28

Therefore, there are 28 students in the class who are studying at least one language.

Answer

There are 28 students in the class who are studying at least one language.