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Ratio
Sample Space
Lesson 36
Power Up G
Page 255
Ratio
 Relationship between two numbers.
The softball team had 4 loses and 10 wins. The ratio of loses
to wins is 4 to 10.
Ratio
Can be written:
 with the word to
 as a fraction
 as a decimal
 with a colon
Ratio
 There are 32 marbles in a bag. 18 of those marbles are
blue.
 What is blue - red ratio?
 What is the red - blue ratio?
Ratio
5
7
 The team won of their games and lost the rest. What was
the team’s win loss ratio?
Ratio
 There are yellow and green marbles in a bag. If the ratio
of yellow to green is 3 to 4, what fraction of the total
number of marbles is green?
Sample Space
 All the possible outcomes of a probability event.
What is the sample space of:
 Flipping a coin once?
 Rolling a number cube?
Sample Space
 A coin is flipped two times. What is the probability of
getting tails at least once?
Sample Space
 A coin is flipped and a spinner is spun. What is the
probability of getting a heads and an even number?
Fundamental Counting Principle
 Multiply the total number of possible outcomes for each
event together.
1
2
3
4
A
A1
A2
A3
A4
B
B1
B2
B3
B4
C
C1
C2
C3
C4
D
D1
D2
D3
D4
E
E1
E2
E3
E4
F
F1
F2
F3
F4
G
G1
G2
G3
G4
H
H1
H2
H3
H4