A chain letter starts when a person sends a letter to five
Chapter , Problem 22E(choose chapter or problem)
Problem 22E
A chain letter starts when a person sends a letter to five others. Each person who receives the letter either sends it to five other people who have never received it or does not send it to anyone. Suppose that 10.000 people send out the letter before the chain ends and that no one receives more than one letter. How many people receive the letter, and how many do not send it out?
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