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Mathematics 12 Online
OpenStudy (anonymous):

a toy store worker packed two boxes of identical dolls and plush toys for shipping in boxes that weigh 1 oz when empty. one box held 3 dolls and 4 plush toys. The worker marked the weight as 12 oz. the other box held 2 dolls and 3 plush toys. The worker marked the weight as 10 oz. Explain why the worker must have made a mistake.

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