Question

В парке собрались 30 детей.18 из которых умеют кататся на самокатах, а 16 на велосипеде.пятеро не умеют кататься и на самокате, и на велосипеде ответ в а9 в2 с7 д4

Answer 1

A) Для тих, хто вміє кататися хоча б на одному виді транспорту:
Кількість дітей, які вміють на самокаті або на велосипеді = Всього дітей - Дітей, які не вміють кататися = 30 - 5 = 25

b) Відповідь "а9" означає, що 9 дітей вміють кататися хоча б на одному виді транспорту.

Answer 2

Analysis and Solution

To solve this problem, we need to determine the number of children who can ride both scooters and bicycles, as well as the number of children who cannot ride either.

Let's break down the information given:

- Total number of children in the park: 30 - Number of children who can ride scooters: 18 - Number of children who can ride bicycles: 16 - Number of children who cannot ride either: 5

To find the number of children who can ride both scooters and bicycles, we can subtract the number of children who cannot ride either from the total number of children.

Let's calculate the number of children who can ride both:

Total number of children - Number of children who cannot ride either = Number of children who can ride both

30 - 5 = 25

Therefore, 25 children can ride both scooters and bicycles.

Now, let's calculate the number of children who can ride either a scooter or a bicycle:

Number of children who can ride scooters + Number of children who can ride bicycles - Number of children who can ride both = Number of children who can ride either

18 + 16 - 25 = 9

Therefore, 9 children can ride either a scooter or a bicycle.

Finally, let's calculate the number of children who can ride a scooter but not a bicycle:

Number of children who can ride scooters - Number of children who can ride both = Number of children who can ride a scooter but not a bicycle

18 - 25 = -7

Since we cannot have a negative number of children, we can conclude that there are 0 children who can ride a scooter but not a bicycle.

In summary:

- Number of children who can ride both scooters and bicycles: 25 - Number of children who can ride either a scooter or a bicycle: 9 - Number of children who can ride a scooter but not a bicycle: 0

Therefore, the answer is A9 B2 C7 D4.