Question
Oliver had some $10 notes and $20 notes. The ratio of his $10 notes to $20 notes was 7 : 2. If Oliver had a total of $550, how many pieces of notes did he have altogether?
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Oliver had some $10 notes and $20 notes. The ratio of his $10 notes to $20 notes was 7 : 2. If Oliver had a total of $550, how many pieces of notes did he have altogether?