Let
π
be the number of students who show up for a professorβs office hour on a particular day. Suppose that the pmf of
π
is
π
(
0
)
=
.20
,
π
(
1
)
=
.25
,
π
(
2
)
=
.30
,
π
(
3
)
=
.15
, and
π
(
4
)
=
.10
.
Draw the corresponding probability histogram.
What is the probability that at least two students show up? More than two students show up?
HIDE ANSWER
.55
,
.25
What is the probability that between one and three students, inclusive, show up?
SHOW ANSWER
What is the probability that the professor shows up?