problem 3 which of the following is a discrete random variable i the average height of a randomly selected group of boys ii the annual number of sweepstakes winners from new york city iii the number of presidential elections in the 20th century

Problem 3

Which of the following is a discrete random variable?

I. The average height of a randomly selected group of boys.

II. The annual number of sweepstakes winners from New York City.

III. The number of presidential elections in the 20th century.

(A) I only

(B) II only

(C) III only

(D) I and II

(E) II and III