Every student in your history
class is required to present a project in front of the
class. each day, 4 students make their presentations in
an order chosen at random by the teacher. you make
your presentation on the fi rst day.
a. what is the probability that you are chosen to be
the fi rst or second presenter on the fi rst day?
b. what is the probability that you are chosen to
be the second or third presenter on the fi rst day?
compare your answer with that in part (a).