Venn diagrams (combinatorics)

First, students will learn how to draw Venn diagrams and properly determine how many are in each region. Have them solve problems such as the following:

There are 30 students in the classroom. 23 students have blonde hair. 12 students have green eyes. 5 students have blonde hair and green eyes. How many students have blonde hair but not green eyes?

Watch this to get an idea of how to solve such problems. Next, have students try the NRICH challenge Takeaway Time. Then have students attempt this MAA problem.

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