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A certain organization consists of five leaders and some number of regular members. Every year, the current leaders are kicked out of the organization. Next, each regular member must find two new people to join as regular members. Finally, five new people are elected from outside the organization to become leaders. In the beginning, there are fifteen people in the organization total. How many people total will be in the organization five years from now?

 Dec 9, 2020
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This is a simple geometric series problem: The organization has 15 people, so in the nth year, it will have 15*3^(n - 1) people.  So in the fifth year, it will have 1215 people.

 Dec 9, 2020

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