Suppose X and Y are random variables whose density function is given by $f ( x , y ) = \left\{ \begin{array} { c l }
0.2 e ^ { - ( 05 x + 0.4 y ) } & \text { if } x \geq 0 , y \geq 0 \
0 & \text { otherwise }
\end{array} \right.$ is a joint density function.
A)0.2
B) $\frac { 1 } { e }$
C)0.25
D)1
E) $\frac { 1 } { 2 e }$
F) $\frac { 1 } { \sqrt { e } }$
G)0.1
H)0

Question

Suppose X and Y are random variables whose density function is given by $f ( x , y ) = \left\{ \begin{array} { c l } 
0.2 e ^ { - ( 05 x + 0.4 y ) } & \text { if } x \geq 0 , y \geq 0 \
0 & \text { otherwise }
\end{array} \right.$ is a joint density function.
A)0.2
B) $\frac { 1 } { e }$
C)0.25
D)1
E) $\frac { 1 } { 2 e }$  
F) $\frac { 1 } { \sqrt { e } }$
G)0.1
H)0

Quizplus · Accepted Answer

The Answer of Suppose X and Y are random variables whose density function is given by $f ( x , y ) = \left\{ \begin{array} { c l } 
0.2 e ^ { - ( 05 x + 0.4 y ) } & \text { if } x \geq 0 , y \geq 0 \
0 & \text { otherwise }
\end{array} \right.$ is a joint density function.
A)0.2
B) $\frac { 1 } { e }$
C)0.25
D)1
E) $\frac { 1 } { 2 e }$  
F) $\frac { 1 } { \sqrt { e } }$
G)0.1
H)0

Suppose X and Y Are Random Variables Whose Density Function