Answer:
His assumption is based upon his belief that the average is fixed and not just random; the number each person gets is random, and with none more likely than another.
Step-by-step explanation:
Answer:

Step-by-step explanation:
You have the following functions:

Therefore
indicates that you must divide both functions, as you can see below:

Simplify it. Therefore, you obtain:

Answer:
b) 24
Step-by-step explanation:
We solve building the Venn's diagram of these sets.
We have that n(S) is the number of succesful students in a classroom.
n(F) is the number of freshmen student in that classroom.
We have that:

In which n(s) are those who are succeful but not freshmen and
are those who are succesful and freshmen.
By the same logic, we also have that:

The union is:

In which



So



So the correct answer is:
b) 24