Among the students of AUCA, 30% know two foreign languages. Find the mean and the standard deviation of the number of such students among 11 randomly chosen. What is the probability that at most 2 students among them know two foreign languages?

Among the students of AUCA, 30% know two foreign languages. Find the mean and the standard deviation of the number of such students among 11 randomly chosen. What is the probability that at most 2 students among them know two foreign languages?

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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Among the students of AUCA, 30% know two foreign languages. Find the mean
and the standard deviation of the number of such students among 11 randomly chosen.
What is the probability that at most 2 students among them know two foreign languages?

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