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Mathematics 17 Online
OpenStudy (realsiege):

Probability help!

OpenStudy (realsiege):

(Probability) Andy has to join 2 clubs in his school. The clubs are divided into 3 categories: 5 in art, 4 in sports, and 5 in sciences. How many ways can Andy join 2 clubs from different categories? What's the probability of choosing 2 clubs from the same category?

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