Which of the following random variables are discrete? I). the volume of a balloon in liters
II)) the number of helium atoms in a balloon
II)) the number of balloons at a birthday party
A)I only
B)II only
C)III only
D)II and III only
E)I, II, and III

Question

Quizplus · Accepted Answer

II and III are discrete because they can only take on integer values (you can't have a fraction of an atom or balloon), while volume can vary continuously.

Which of the Following Random Variables Are Discrete? I)