SOLUTION: Benito has 20 small balls of different colours: yellow, green, blue and black. 17 of the balls are not green, 5 are black, 12 are not yellow. How many blue balls does Benito have?

Algebra ->  Algebra  -> Permutations -> SOLUTION: Benito has 20 small balls of different colours: yellow, green, blue and black. 17 of the balls are not green, 5 are black, 12 are not yellow. How many blue balls does Benito have?       Log On

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 Algebra: Combinatorics and Permutations Solvers Lessons Answers archive Quiz In Depth

 Question 302061: Benito has 20 small balls of different colours: yellow, green, blue and black. 17 of the balls are not green, 5 are black, 12 are not yellow. How many blue balls does Benito have? A) 3 B) 4 C) 5 D) 8 E) 15 Answer by scott8148(6628)   (Show Source): You can put this solution on YOUR website!"17 of the balls are not green" ___ so 3 are green "12 are not yellow" ___ so 8 are yellow "5 are black" so 16 are NOT blue