B-Suppose a random variable X has probability function3P(X=x)0.625b.0.125aIf the expected value of X is u =1.25.1. Calculate the value of a & b.2. What is Var (X)? Sd (X)?

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If the expected value of X is u = 1.25. 1. Calculate the value of a & b. 2. What is Var (X)? Sd (X)?

College Algebra

7th Edition

ISBN:9781305115545

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter9: Counting And Probability

Section9.4: Expected Value

Problem 1E: If a game gives payoffs of $10 and $100 with probabilities 0.9 and 0.1, respectively, then the...

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Question

B-Suppose a random variable X has probability function
3
P(X=x)
0.625
b.
0.125
a
If the expected value of X is u =1.25.
1. Calculate the value of a & b.
2. What is Var (X)? Sd (X)?

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