Let X and Y be two continuous random variables with joint probability density 3x function given by: f(x,y)= 0

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.CR: Chapter 13 Review
Problem 22CR
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Let X and Y be two continuous random variables with joint probability density
[3x
function given by: f(x,y)=
0<ysrsl
elsewhere
3
with E(X) =, E(X²)=², E(Y)=?. E(Y') =-and E(XY)=
3
E(Y') =and E(XY) =-
10
5'
8
Then the value of the variance of 2.X + Y is:
O 3/80
O 91/320
O 43/320
O 7/20
Transcribed Image Text:Let X and Y be two continuous random variables with joint probability density [3x function given by: f(x,y)= 0<ysrsl elsewhere 3 with E(X) =, E(X²)=², E(Y)=?. E(Y') =-and E(XY)= 3 E(Y') =and E(XY) =- 10 5' 8 Then the value of the variance of 2.X + Y is: O 3/80 O 91/320 O 43/320 O 7/20
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ISBN:
9780321964038
Author:
GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,