7th Grade Math

Mid-Chapter

Check

448 Probability and Predictions

A number cube is rolled. Find each probability.

Write as a fraction in simplest form. (Lesson 1A)

1. P(an odd number)


2. P(a number not greater than 4)


3. P(a number less than 6)


4. P(a multiple of 2)


5. BOOKS Brett owns 5 science-fiction
   books, 3 biographies, and 12 mysteries.
   If he randomly picks a book to read,
   what is the probability that he will not
   pick a science-fiction book? Write as a
   percent. (Lesson 1A)
   For each situation, find the sample space
   using a tree diagram. (Lesson 1B)


6. The spinner shown
   A B

C D

is spun, and a digit

is randomly selected

from the number 803.

7. Two coins are tossed.


8. MULTIPLE CHOICE At a diner, a customer
   can choose from eggs or pancakes as an
   entrée and from ham or sausage as a side.
   Which set shows all the possible choices of
   one entrée and one side? (Lesson 1B)
   A. {(eggs, pancakes), (ham, sausage)}
   B. {(eggs, ham), (eggs, sausage),
   (pancakes, ham), (pancakes, sausage)}
   C. {(eggs, ham), (eggs, pancakes),
   (sausage, pancakes)}
   D. {(eggs, ham), (pancakes, sausage)}


9. GAMES Abbey rolls a number cube and
   chooses a card from among cards marked
   A, B, and C. If an odd number and a vowel
   turn up, Abbey wins. Otherwise, Benny
   wins. Find the sample space. Then find the
   probability that Benny wins. (Lesson 1B)

Use the Fundamental Counting Principle to

find the total number of possible outcomes

for each situation. (Lesson 1C)

10. A customer chooses a paper color, size, and
    binding style for some copies.

Color Size Binding

white 8.5” x 11” paper clip

yellow 8.5” x 14” binder clip

green 8.5” x 17” staple

11. A number cube is rolled and three coins
    are tossed.


12. CARS A certain car Exterior Interior
    Black Gray
    White Tan
    Red
    Silver

model comes in the

colors in the table and

with an automatic or

manual transmission.

Find the probability

that a randomly selected car will have a

black exterior, tan interior, and manual

transmission if all outcomes are equally

likely. (Lesson 1C)

13. COMPETITION How many ways can
    6 swimmers come in first, second, or
    third place? (Lesson 1D)


14. MULTIPLE CHOICE Noriko packed five
    different sweaters for her three-day trip. If
    she randomly selects one sweater to wear
    each day, what is the probability that she
    will select the brown sweater on Day 1,
    the orange sweater on Day 2, and the
    pink sweater on Day 3? (Lesson 1D)
    F. ^1
    60
    G. ^1
    120
    H. ^3
    5
    I. ^1
    5

448_C08_MCC_895130.indd 448 12/29/09 1:17 PM