A := RandomVariable(Geometric(p))+1; F := Mean(A);M := abs(A-F)/A;
#and ask Maple to find a pdf of the r.v. M:
f := `assuming`([PDF(M, x)], [x > 0])
#Maple 15 gives an answer, but what does it mean by the output for this input
subs(p = 1/3, x = 3, f)
#or how do I plot this pdf of M? Does Maple give a correct answer?
# Why does the error message appear when I do subs(p = 1/3, x < 3, f...