**13. Incorrect. The answer is
false not true.** The
probability of producing** **LPG from
reservoir A is equal to 100% because propane and butane are the necessary
hydrocarbons to produce LPG. In probabilistic terms: P (LPG in reservoir A) =
1. Schaum's Outline presents this result as a basic
axiom of probability. The probability of producing LPG from reservoir B is 0%
because it does not contain either propane or butane. In probabilistic terms, P
(LPG in reservoir B) = 0.