Let E1 denote the event that a structural component fails during a test and E2 denote the event that the component shows some strain but does not fail. Given P (E1) = 0.20 and P(E2) = 0.35: . What is the probability that a structural component does not fail during a test? . What is the probability that a component either fails or shows strain during a test? . What is the probability that a component neither fails nor shows strain during a test