Chapter 11 Data Analysis

Deserted Island

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A passenger plane makes an emergency landing on a deserted island with 120 persons on board. The cargo included enough food to last for 15 days. On the morning of the sixth day, before the daily rations were handed out, a ship sank close to the island. All 30 ship passengers made it to shore. How long can the two groups survive, assuming that rations per person remain the same?

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Note: Brain teasers are often open to more than one interpretation, and multiple answers may be possible. Sample solutions are shown.