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OpenStudy (osanseviero):
So two problems (just to check if I did them right)
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OpenStudy (osanseviero):
1. There are 9 different students. How many comissions of 3 students can I form? 9C3=84
OpenStudy (osanseviero):
2. A person has 5 coins of different values. ¿How many different additions can I make?
OpenStudy (osanseviero):
How to do this last one?
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