6.
A bin contains 20 machine parts among which 5 are defective. Four parts are
randomly drawn from the bin one after the other without replacement.
a. What is the probability of getting all non defective parts?
(2pts)
b. What is the probability of getting all defective parts?
c. What is the probability of getting exactly one defective part?
(4pts)
d. What is the probability of getting at least one defective part?
(2pts)
e. Are the drawings dependent or independent? Justify.
(2pts)
