The table below shows the number of tests taken by 30 randomly selected college sophomores
Number of tests taken Number of students
4 or more 5
If a student is selected at random, find the probability
a) the student has taken exactly two tests
b) the student has taken at least two tests
c) the student has taken at most three tests
d) the student has taken 3 or fewer tests
e) the student has taken one or two tests.
This solution provides equations for various probability tests.