Answered: 6. If the probability of picking a…

6. If the probability of picking a winning horse in a race is 0.2, and if X is the number of winning picks out of 20 races, what is: (a) P[X = 4]. (b) P[X < 4]. (c) E(X) and Var(X).

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter11: Rational And Irrational Numbers

Section: Chapter Questions

Problem 23CLR

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Question

6. If the probability of picking a winning horse in a race is 0.2, and if X is the number of
winning picks out of 20 races, what is:
(a) P[X = 4].
(b) P[X < 4].
(c) E(X) and Var(X).

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