2nd Assignment

A research is conducted about aeroplane accidents. Probability that finding the right accident cause in case the cause is about structural elements is 0,9. However, if the cause is not about structural element, probability that experts say the accident cause is structural elements is 0,2. In fact 25% of the aeroplane accidents are caused by structural elements . What is the probability that the result is correct when the experts say that the accidents is caused by structural elements?