Question
Tommy had some $10 notes and $20 notes. The ratio of his $10 notes to $20 notes was 9 : 1. If Tommy had a total of $550, how many pieces of notes did he have altogether?
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Tommy had some $10 notes and $20 notes. The ratio of his $10 notes to $20 notes was 9 : 1. If Tommy had a total of $550, how many pieces of notes did he have altogether?