Question: Sampling without replacement, Let X be the indicator of the event that a good element appears at place j in a random ordering of n elements consisting of g good elements and n -g bad ones.
a) Find a formula for P(x1, . . xn) = P(X1 - x1, . . Xn = xn).
b) Are the random variables X1, .. Xn independent? prove your answer.
c) Are they exchangeable? Prove your answer.