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From NPR (Posted on 2018-05-08) Difficulty: 2 of 5
Thirty buyers attended an auction of dozens of cars. Ten of the buyers bought fewer than 6 cars; eight bought more than 7 cars; five bought more than 8 cars; and one bought more than 9 cars.

Of the 30 buyers, how many bought 6, 7, 8, or 9 cars?

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
SolutionJust counting (spoiler)Steve Herman2018-05-08 12:17:01
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