Question

A campus program enrolls equal number undergraduate and graduate students. If a random sample of 4 students is selected from the program to be interviewed about the introduction of a new fast food outlet on the ground floor of the campus building, what is the probability that all 4 students selected are undergraduate students?

Answer 1

4/(X+Y)

Explanation:

Let the total number of Undergraduate students be X

Let the Total number of graduate students be Y

Therefore probability that the four students selected are undergraduate is equal to 4÷ (X+Y)

Where X+Y= total number of students