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In a class of 20 students, how many conversations must be had so that every student talks to every other students in the class?

Respuesta :

Kaurol

Answer:

190

Step-by-step explanation:

Similar to the handshake problem, if every student must talk with another person, each student will talk to 19 other students. However, a conversation consists of two people, so we must divide the number of ways we can rearrange the two people. Therefore, our answer is 190

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