1) A census of a company's 500 employees in regard to a certain proposal revealed that 125 of its 150 white-collar workers are in favor of the proposal and a total of 125 workers opposed the proposal. All workers can be classified as either white-collar or blue-collar. Find the probability that an employee selected at random he is,

a) In favor of the proposal if he is a blue-collar worker

b) Either a white-collar worker or blue-collar worker is in favor of the proposal

2) A company vendor knowing that the vendor's manufacturing process produces 0.005 defective parts. What is the probability that the company will receive at most 3 defective parts from a lot of 20,000 parts?