7th Grade Math

Test PracticeT

Lesson 1C Probability 443

C 15. CHALLENGE Determine the number of possible outcomes when tossing

one coin, two coins, and three coins. Then determine the number of

possible outcomes for tossing n coins. Describe the strategy you used.

16. Which One Doesn’t Belong? Identify the choices for events M and N that
    do not result in the same number of outcomes as the other two. Explain
    your reasoning.

9 drinks, 8 desserts

18 shirts, 4 pants

10 groups, 8 activities

17. E WRITE MATH Compare and contrast the Fundamental Counting
    Principle and tree diagrams.


18. SCHOOL Corinna can choose from 2 geography, 3 history, and 2 statistics
    classes. Find the sample space for all possible schedules. (Lesson 1B)

PROBABILITY Find the probability that the spinner shown at the right will

stop on each of the following. Write as a fraction in simplest form. (Lesson 1A)

21. P(a vowel)


22. P(red)


23. P(R)


24. P(S)
    18. A bakery offers white, chocolate, or
    yellow cakes with white or chocolate
    icing. There are also 24 designs that can
    be applied to a cake. If all orders are
    equally likely, what is the probability
    that a customer will order a white cake
    with white icing in a specific design?
    A. _ 301

B. _ 641

C. _ 1201

D. _ 1441

19. SHORT RESPONSE Hat Shack sells
    9 different styles of hats in several
    different colors for 2 different sports
    teams. If the company makes 108 kinds
    of hats, how many different colors do
    they make?

Hat Shack

Styles Colors Teams

9?2

UI

RE

Q M

T A

M

440_447_C08_L1_895130.indd 443 12/29/09 1:18 PM