MPORTANT:
Showing your work and how you reached the answer is critical in receiving
your grade…simply putting down values as the final answer will not earn you
any points.
Week 4 LT Assignments
Chapter 5:
12. The events X and Y are mutually exclusive. Suppose P(X) _ .05 and P(Y) _
.02. What is the probability of either X or Y occurring? What is the probability
that neither X nor Y will happen?
18. Let P(X) _ .55 and P(Y) _ .35. Assume the probability that they both occur
is .20. What is the probability of either X or Y occurring?
44.
Berdine’s Chicken Factory has several stores in the Hilton Head, South
Carolina, area. When interviewing applicants for server positions, the owner
would like to include information on the amount of tip a server can expect to
earn per check (or bill). A study of 500 recent checks indicated the server
earned the following amounts in tips per 8-hour shift.
Amount of Tip Number
$0 up to $ 20 200
20 up to 50 100
50 up to 100 75
100 up to 200 75
200 or more 50
Total 500
a. What is the probability of a tip of $200 or more?
b. Are the categories “$0 up to $20,” “$20 up to $50,” and so on
considered mutually exclusive?
c. If the probabilities associated with each outcome were totaled, what
would that total be?
d. What is the probability of a tip of up to $50?
e. What is the probability of a tip of less than $200?
