What is the probability that a randomly selected part-time student at this college takes at least 2
courses? (That is, find P(X ≥
2
)

Question 12 of 20
1.0/ 1.0 Points
The random variable X = the number of vehicles owned. Find the probability that a person owns
less than 2 vehicles.
x
0
1
2
3
4
P(X
=
x
)
0.1 0.35 0.25 0.2 0.1

Question 13 of 20
1.0/ 1.0 Points
Let X be the number of courses taken by a part-time student at a college. The following table
shows the probability distribution of X with probability as a percentage.
Number of Courses ,
x
1
2
3
Probability,
P
(
X
=
x
)
46% 28% 26%
What is the probability that a randomly selected part-time student at this college takes at least 2
courses? (That is, find P(X
≥
2)

Part 5 of 6 - Poisson Distribution Knowledge Check Practice
5.0/ 5.0 Points
Question 14 of 20
1.0/ 1.0 Points
There are on average 5 old growth Sitka Spruce trees per 1/8 of an acre in a local forest. Find the
probability that that there are exactly 30 Sitka Spruce trees in 1 acre in a remote part of the

Question 15 of 20
1.0/ 1.0 Points
A bank gets an average of 11 customers per hour. Assume the variable follows a Poisson
distribution. Find the probability that there will be 9 or more customers at this bank in one hour.

Question 16 of 20
1.0/ 1.0 Points
The mean number of visitors at a national park in one weekend is 47. Assume the variable
follows a Poisson distribution. Find the probability that there will be at most 55 visitors at this

Question 17 of 20
1.0/ 1.0 Points
A coffee shop serves an average of 72 customers per hour during the morning rush. Find the
probability that less than 59 customers arrive in an hour during tomorrow’s morning rush.

Feedback:

P(x < 59) = P(x
58), In Excel
=POISSON.DIST(58,72,TRUE)
Question 18 of 20
1.0/ 1.0 Points
A bank gets an average of 12 customers per hour. Assume the variable follows a Poisson
distribution. Find the probability that there will be 10 or more customers at this bank in one

Part 6 of 6 - Probability Knowledge Check Practice
2.0/ 2.0 Points