A flexible circuit is chosen at random among the 1,000 circuits in a production batch. There can be three types of faults, denoted A, B and C. The circuits have type A faults in 2% of cases, type B in 1% of cases and type C in 1.5% of cases. They behave at the both type A and type B faults in 0.5% of cases, type A and type C in 0.6% of cases, type B and type C in 0.4% of cases and of each type in 0.2% of cases. What is the probability that the chosen circuit has type A faults only?