Question
The average number of cards Jack and Carl had was 113. The average number of cards Jack and Billy was 66.5. Given that the ratio of the number of cards Carl had to the number of cards Billy had was 5 : 2, find the number of cards Jack had.
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The average number of cards Jack and Carl had was 113. The average number of cards Jack and Billy was 66.5. Given that the ratio of the number of cards Carl had to the number of cards Billy had was 5 : 2, find the number of cards Jack had.