Question
The ratio of Gabriel's cards to Risa's cards at first was 2 : 5. After Gabriel gave Risa 15 cards, the ratio of Gabriel's cards to Risa's cards is 1 : 4. What was the number of cards they had in total?
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The ratio of Gabriel's cards to Risa's cards at first was 2 : 5. After Gabriel gave Risa 15 cards, the ratio of Gabriel's cards to Risa's cards is 1 : 4. What was the number of cards they had in total?