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On a particularly boring transatlantic flight, one of the authors amused himself by counting the heads...

Question:

On a particularly boring transatlantic flight, one of the authors amused himself by counting the heads of the people in the s
On a particularly boring transatlantic flight, one of the authors amused himself by counting the heads of the people in the seats in front of him. He noticed that all 28 of them either had black hair or had a whole row to themselves (or both). Of this total, 25 had black hair and 7 were fortunate enough to have a whole row of seats to themselves. How many of the black-haired people had whole rows to themselves? people

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We have 28 Black hair people lo to tal people un numbers 85 People having whole to thenscenes 7. black - naised people having

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