Which situation would be represented by a discrete probability distribution? a) the weight of fire fighters b) the overall average of a math class c) the ages of all the students in a class d) the number of students who could distinguish between two different soft drinks

A discrete variable is a variable which may take only certain discrete values; for example the number of people in a household is a discrete variable which may have the value 1, 2, 3, etc. but cannot have intermediate values such as 1.473 or 3.732.

Choice d) can be represented by a discrete probability distribution, the other choices cannot be so represented.