Question

if
$\frac{xy}{x + y} = a$
$\frac{xz}{x + z} = b$
$\frac{yz}{y + z} = c$
, where a, b and c are other than zero, then x equals.
​

Answer 1

Step-by-step explanation:

$\frac{xy}{x + y} = a$

$\frac{xz}{x + z} = b$

$\frac{yz}{y + z} = c$

Answer 2

Answer:

Let X,Y and Z be three jointly continuous random variables with joint PDF

fXYZ(x,y,z)={

1

3

(x+2y+3z) 0≤x,y,z≤1 0 otherwise

Find the joint PDF of X and Y, fXY(x,y).