Statistics Question: 1,000 students were surveyed and asked how many online courses they have taken at UCF.

Question

What is the probability a student has taken at least one online course?

# of online courses     # of students
         taken

               0                125
               1                428
               2                256
               3                108
               4                83


( I am not sure how to find the probability of this )

Answer 1

Hi Ashley.

 

We have

# of online courses taken        # of students

                0                                      125  
                1                                      428
                2                                      256
                3                                      108
                4                                       83

 

We're told that 1000 students are surveyed so the 2nd column should sum to 1000.  It does.

 

We need to know how many student took at least one on line class.  We can either add the #students for 1, 2, 3 & 4 classes or subtract those who did not take an on line class from the total.  875 students have taken at least one on line class.

 

The probability that a student at UCF has taken at least one on line class is 875/1000 or 87.5%.