16.) In a small preliminary drug trial, 5 people are given version A of the medication, 5 people are given version B, and 5 people are given a placebo. If a random sample of 6 participants is selected for evaluation, what is the probability that at most 2 of them were given the placebo?

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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16.) In a small preliminary drug trial, 5 people are given version A of the medication, 5 people
are given version B, and 5 people are given a placebo. If a random sample of 6 participants is
selected for evaluation, what is the probability that at most 2 of them were given the placebo? 

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