Question

В отряде из 40 ребят 30 умеют плавать,27-умеют играть в шахматы и только пятеро не умеют ни того, ни другого.Сколько ребят умеют плавать и играть в шахматы?Но кругами Эйлера.

Answer 1

1) 27+30=57
2) 40-5=35
3) 57-35=22
Ответ 22 ребят могут и плавать и играть в шахматы)

Answer 2

Problem Analysis

We are given the following information: - There is a group of 40 children. - 30 children can swim. - 27 children can play chess. - Only 5 children cannot swim or play chess.

We need to determine how many children can swim and play chess.

Solution

Let's break down the information given:

- Total number of children: 40 - Number of children who can swim: 30 - Number of children who can play chess: 27 - Number of children who cannot swim or play chess: 5

To find the number of children who can swim and play chess, we need to subtract the number of children who cannot swim or play chess from the total number of children.

Let's calculate it:

Total number of children - Number of children who cannot swim or play chess = Number of children who can swim and play chess

40 - 5 = 35

Therefore, 35 children can swim and play chess.

Answer

Based on the given information, there are 35 children who can swim and play chess.