The events (1) loss of offsite power, (2) Coolant pumps, (3) Steam water system, and (4) Transients] contribute to core damage frequency (CDF). Given a core damage event, calculate the probability that it was not initiated by loss of offsite power. The frequencies per year for respective events are: \(1,0.1,2\), and 0.01 . The conditional probability of core damage for respective events are: \(3 \times 10^{-5}, 1 \times 10^{-4}, 1 \times 10^{-5}\), and \(1 \times 10^{-3}\).