1. A chain letter is sent to five people on the first week of the year. Each of these five people then sends a copy of the letter to five more people during the second week of the year. Assuming that everyone who receives a letter participates, explain how you know with certainty that someone will receive a second copy of the letter later in the year. Show your work.
Can anyone help me with math? Specifically, Pre calc!?
- Thread starter Adrian
- Start date