Explanation Given: X is equal to the number of hits obtained by a certain baseball player in his next at bats. P ( X = 1 ) = 0.30 , P ( X = 2 ) = 0.20 P ( X = 0 ) = 3 P ( X = 3 ) Calculation: By the property of probability, ∑ p ( x ) = 1 P ( X = 0 ) + P ( X = 1 ) + P ( X = 2 ) + P ( X = 3 ) = 1 3 P ( X = 3 ) + P ( X = 1 ) + P ( X = 2 ) + P ( X = 3 ) = 1 4 P ( X = 3 ) + 0

9th Edition

ISBN: 9780321794772

Author: Sheldon Ross

Publisher: PEARSON

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Chapter 4 Solutions

A First Course in Probability

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The expectation of X.

Solution Summary: The author calculates the expectation of X, which is equal to the number of hits obtained by a certain baseball player in his next at bats.

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Chapter 4 Solutions