(a) Last year, 425 companies applied for 52 tenders floated by the government. This year, you will be applying for one of 52 similar tenders being floated, and would like to estimate the probability of being allotted one. Give your estimate and comment on one factor that might influence your estimate.

(b) In a recent random check of 650 valves at a plant, 39 were defective. For a randomly selected valve today, what is the probability that it is defective?