Question
The ratio of Joseph's pens to Avery's pens at first was 3 : 7. After Joseph gave Avery 66 pens, the ratio of Joseph's pens to Avery's pens is 1 : 3. What was the number of pens they had in all?
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The ratio of Joseph's pens to Avery's pens at first was 3 : 7. After Joseph gave Avery 66 pens, the ratio of Joseph's pens to Avery's pens is 1 : 3. What was the number of pens they had in all?