Please check the fifth part (e), by law of total probability, shouldn't it 109/400? Question 4: The discrete random variable X has probability distribution given by x -1 0 1 2 P(X=x) Find the value of a 1½ a -19 a (a) (b) Write down E(X). (c) Find Var.(X). The random variable Y = 6-2X. (d) Find Var. (Y). (e) Calculate P(XY) 3 115
Please check the fifth part (e), by law of total probability, shouldn't it 109/400? Question 4: The discrete random variable X has probability distribution given by x -1 0 1 2 P(X=x) Find the value of a 1½ a -19 a (a) (b) Write down E(X). (c) Find Var.(X). The random variable Y = 6-2X. (d) Find Var. (Y). (e) Calculate P(XY) 3 115
College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section: Chapter Questions
Problem 14T: An unbalanced coin is weighted so that the probability of heads is 0.55. The coin is tossed ten...
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Transcribed Image Text:Please check the fifth part (e), by law
of total probability, shouldn't it
109/400?
Question 4:
The discrete random variable X has probability distribution given by
x
-1
0
1
2
P(X=x)
Find the value of a
1½
a
-19
a
(a)
(b)
Write down E(X).
(c)
Find Var.(X).
The random variable Y = 6-2X.
(d)
Find Var. (Y).
(e)
Calculate P(XY)
3
115
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