1. The probability that a student passing a certain exam is . Find the probability that in the group of 8 students only 3 will pass the examination?
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?
3. Suppose that the chance that a certain type of seed does not germinate is 4%. If 50 such seeds are planted, then what is the probability that 3 or fewer seeds do not germinate?