If we use random numbers to take a simple random sample of 50 students from the 3500 undergraduate students at the University of Rochester,

(a) It is impossible to get the random number 1111, because it is not a random sequence.

(b) If we get 2001 for the first random number, for the second random number that number is less likely to occur than the other possible four-digit random numbers.

(c) The draw 1234 is no more or less likely than the draw 1111.

(d) Since the sample is random, it is impossible that it will be non representative, such as having only females in the sample.