URBAN OPERATIONS RESEARCH
Logistical and Transportation Planning Methods
fX1,X2(x1,x2) =
fX2|X1(x2 | x1).fX1(x2)
= 1 / x1
Note: not all (x1, x2) are equally likely.
All X1 between 0 and 1 are equally likely with probability 1.
Given x1, all points to the left are equally likely w.p. 1/x1.
