Angol Matematika

Exercises

http://angolmatematika.hupont.hu/15/sets 

State which of the following sets are finite or empty?

a, {1, 2, 3, 5, 9}

b, {2, 4, 6}

c, {letters of the alphabet}

d, {people of the class who swam in the Pacific-Ocean}

http://angolmatematika.hupont.hu/14/set-operations

 Logical sieve

In the class the students learn 3 languages. 16 students learn English, 15 students learn French and 10 students learn Spanish. 1 person learns all 3 languages, 2 students learn English and Spanish, 3 students learn French and English and 2 students learn Spanish and French.
How many students are there in the class? 

The class headcount is 35.

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