# Statistics Supplemental Instruction Handouts Statistics Chapter 4 A

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```					                    Supplemental Instruction Handouts
Statistics
Chapter 4:
A Survey of Probability
Concepts

1. You have just stopped at the gum ball machine and noticed that it was recently
refilled. The machine has 4 black, 50 red, 50 orange, 50 green and 46 blue.

a)   What is the probability of getting a black gum ball?
b)   What is the probability of not getting a black gum ball?
c)   What is the probability of getting a red or an orange gum ball?
d)   If two people were to get gum balls from the machine, what is the probability
they got a red and then an orange gum ball?

2. If you were to select a card from a standard deck of cards, what is the probability
you select a spade or a king?

3. A box contains two left – handed and seven are right – handed gloves. If you
were to ask the next three strangers who walk by to reach into the box and
randomly pick only one glove out of the box and then replace it, what is the
probability that all three were to pick left – handed gloves?

4. A science fair has five people competing for the top two prizes. In how many
different ways can the two prizes be awarded?

5. A basketball coach has eight players on his team. The eight players can play any
of the five positions on the basketball court. How many different ways can the
couch put the team together?

6. Suppose that a car dealer decided to offer eight models and six types of wheel
covers. How many possible arrangements can there be?

Learning Assistance Centre     www.rrc.mb.ca/lac
These questions are compiled by Mike Reimer for the Learning Assistance Centre.
7. In the past several years, credit card companies have made an aggressive effort
to solicit new accounts from college students. Suppose that a sample of 200
students at your college indicated the following information as to whether the
student possessed a bank credit card and/or an entertainment credit card:

Entertainment Credit Card
Bank Credit Card                      Has          Has Not
Has                                   60             60
Has Not                               15             65

If a student is picked at random, what is the probability that:

a) The student has a bank credit card?
b) The compliment to the student has a bank credit card?
c) The student has an entertainment credit card?
d) The student has a bank credit card and an entertainment card?
e) The student has a bank credit card or has an entertainment credit card?
f) The student does not have a bank credit card or does have an
entertainment credit card?
g) Given that the student has no entertainment credit card, what is the
probability that the student does have a bank credit card?

Learning Assistance Centre     www.rrc.mb.ca/lac
These questions are compiled by Mike Reimer for the Learning Assistance Centre.

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