Chapter9: Sequences, Probability And Counting Theory
Section9.5: Counting Principles
Problem 45SE: An art store has 4 brands of paint pens in 12 different colors and 3 types of ink. How many paint...
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A farmer raises 65 animals on her farm. Some are pigs and some are chickens. If they have 180 legs in all, how many are pigs and how many are chickens?
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