15. Find the expected value of a random variable having the following probability distribution:+a.b.C.d.e.3370193510914033140XP(X=x)-33/10-11/501/1411/752/7

Given that,The probability distribution for the random variable is given as:…

Answered: 15. Find the expected value of a random…

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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2. The number of patients visiting an emergency room during the graveyard shift (11:00pm-7:00pm), denoted by the random variable X, has the following probability distribution: 1 2 3 4 5 P(X=x) .05 .20 .25 .20 .10 .15 .05 a. Find the probability there will be 3 or more emergency room patients during a randomly selected 8-hour graveyard shift. b. Find the probability there will be an even number of patients. c. Find the probability there will be at least 2 but not more than 5 patients. d. Find the probability there will be less than 2 patients. e. How do you suppose the probability distribution above was obtained?
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15. Find the expected value of a random variable having the following probability distribution: X ਅ a. b. C. d. e. 1 33 70 19 35 109 140 33 140 P(X=x) -3 3/10 -1 1/5 0 1/14 1 5 1/7 2/7