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Mathematics, 18.11.2019 20:31 cherishofomah04

Each of a collection of 144 tiles is either triangular or square, either red or blue, and either wooden or plastic. given that there are 68 wooden tiles, 69 red tiles, 75 triangular tiles, 36 red wooden tiles, 40 triangular wooden tiles, 38 red triangular tiles, and 23 red wooden triangular tiles, how many blue plastic square tiles are there?

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