Question

Ребята, помогите! Из-за этой задачи поссорился с родителями! Помогите, и умоляю. 1. Из 100 ребят, отправляющихся в лагерь, кататься на сноуборде умеют 30, на скейтборде 28, на роликах 42. На скейтборде и на сноуборде катаются 8 ребят, на скейтборде и на роликах 10 человек, на сноуборде и на роликах 5 человек, а на всех трёх 3 человека. Хватит ли 20 велосипедов в прокатном пункте лагеря для ребят, которые не умеют кататься ни на сноуборде, ни а скейтборде, ни на роликах!

Answer 1

Не хватит, нужно 29 великов

Answer 2

Problem Analysis

To determine if there are enough bicycles for the children who cannot ride a snowboard, skateboard, or roller skates, we need to find the number of children who can ride at least one of these three activities. Then we can compare that number to the number of available bicycles.

Solution Steps

1. Find the number of children who can ride each activity: snowboarding, skateboarding, and roller skating. 2. Find the number of children who can ride two activities: snowboarding and skateboarding, skateboarding and roller skating, and snowboarding and roller skating. 3. Find the number of children who can ride all three activities. 4. Add up the numbers from steps 1, 2, and 3 to find the total number of children who can ride at least one of the activities. 5. Compare the total number of children to the number of available bicycles.

Solution

To solve this problem, we will follow the steps outlined above.

1. Number of children who can ride each activity: - Snowboarding: 30 - Skateboarding: 28 - Roller skating: 42

2. Number of children who can ride two activities: - Snowboarding and skateboarding: 8 - Skateboarding and roller skating: 10 - Snowboarding and roller skating: 5

3. Number of children who can ride all three activities: 3

4. Total number of children who can ride at least one of the activities: - Number of children who can ride snowboarding: 30 - Number of children who can ride skateboarding: 28 - Number of children who can ride roller skating: 42 - Number of children who can ride two activities: 8 + 10 + 5 = 23 - Number of children who can ride all three activities: 3

Total = 30 + 28 + 42 + 23 + 3 = 126

5. Comparison: - Number of available bicycles: 20 - Total number of children who can ride at least one of the activities: 126

Conclusion: There are not enough bicycles for the children who cannot ride a snowboard, skateboard, or roller skates.

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