Question
The average number of cards Oliver and Luke had was 109. The average number of cards Oliver and Valen was 66.5. Given that the ratio of the number of cards Luke had to the number of cards Valen had was 7 : 2, find the number of cards Oliver had.
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The average number of cards Oliver and Luke had was 109. The average number of cards Oliver and Valen was 66.5. Given that the ratio of the number of cards Luke had to the number of cards Valen had was 7 : 2, find the number of cards Oliver had.