Inexact at best, but .. P(3 locations failing) = 1-0.99999999999 P(1 location failing) = P(3 locations failing)^(1/3) = 0.000215443475 P(2 locations fa

Inexact at best, but .. P(3 locations failing) = 1-0.99999999999 P(1 location failing) = P(3 locations failing)^(1/3) = 0.000215443475 P(2 locations failing) = P(1 location failing)^2 = 0.999569159