In a party, there are 10 people with white shirts and 8 people with red shirts; 4 people have black shoes and white shirts; 3 people have black shoes and red shirts; the total number of people with white or red shirts or black shoes is 21. How many people have black shoes?

In a party, there are 10 people with white shirts and 8 people with red shirts; 4 people have black shoes and white shirts; 3 people have black shoes and red shirts; the total number of people with white or red shirts or black shoes is 21. How many people have black shoes?

Elementary Algebra

17th Edition

ISBN:9780998625713

Author:Lynn Marecek, MaryAnne Anthony-Smith

Publisher:Lynn Marecek, MaryAnne Anthony-Smith

Chapter3: Math Models

Section: Chapter Questions

Problem 425PT: Four-fifths of the people on a hike are children. If there are 12 children, what is the total number...

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Question

In a party,
there are 10 people with white shirts and 8 people with red shirts;
4 people have black shoes and white shirts;
• 3 people have black shoes and red shirts;
the total number of people with white or red shirts or black shoes is 21.
How many people have black shoes?

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