Unit 4 Chapter 8 Probability And Statistics Worksheet Page 5
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46Probability of
8-1
Simple Events
NEW YORK
Performance Indicator 7.S.8 Interpret data to provide the basis
for predictions and to establish experimental probabilities
am I ever going to use this?
What You’ll LEARN
GAMES
The game of double-six dominoes
Find the probability of a
simple event.
is played with 28 tiles. Seven of the tiles are
called doubles.
Write the ratio that compares the number
1.
NEW Vocabulary
of double tiles to the total number of tiles.
outcome
What percent of the tiles are doubles?
2.
sample space
random
Write a fraction in simplest form that represents the part of the
3.
simple event
tiles that are doubles.
probability
complementary events
Write a decimal that represents the part of the tiles that are
4.
doubles.
Suppose you pick a domino without looking at the spots.
5.
REVIEW Vocabulary
Would you be more likely to pick a tile that is a double or one
percent: a ratio that
that is not a double? Explain.
compares a number
to 100
(Lesson 5-1)
In the game of double-six dominoes, there are 28 tiles that can be
picked. These tiles are called the
outcomes
. A list of all the tiles is
called the
sample space
. If all outcomes occur by chance, the outcomes
happen at
random
.
A
simple event
is a specific outcome or type of outcome. When
picking dominoes, one event is picking a double.
Probability
is the
chance that an event will happen.
Key Concept:
Probability
Words
The probability of an event is a ratio that compares the
number of favorable outcomes to the number of possible
outcomes.
number of favorable outcomes
Symbols
P(event)
number of possible outcomes
7
1
Example
P(doubles)
or
2
8
4
The probability that an event will happen is between 0 and 1 inclusive.
A probability can be expressed as a fraction, a decimal, or a percent.
equally likely
impossible
certain
1
1
3
or 0.25
or 0.5
or 0.75
0
1
4
2
4
0%
25%
50%
75%
100%
not very likely
somewhat likely
374
Chapter 8 Probability
Aaron Haupt
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