Nine stranger are put in a room. There is 50% probability that any two random people in the room will become friends. How many "friend-triplets" would we expect to form? ( A "friend-triplet" is when three people are all friend with one another.)

Nine stranger are put in a room. There is 50% probability that any two random people in the room will become friends. How many "friend-triplets" would we expect to form? ( A "friend-triplet" is when three people are all friend with one another.)

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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