The table below shows the grades of 50 students in an exam. If a student is randomly selected, find the probability of his score being less than good.
The probability of an event is the ratio between the number of
outcomes of the event and the number of all possible outcomes in
the sample space.
To find the probability that a randomly selected student's score
is less than good, divide the number of students with less than
good scores ("pass" or "fail") by the total number of students.