Probability Answers

1.

Types of car
Frequency
Relative frequency
Fraction
Decimal
Percentage
Toyota
30
3/10
0.3
30%
Honda
25
1/4
0.25
25%
Mitsubishi
25
1/4
0.25
25%
Holden
20
1/5
0.2
20%
Total
100
1
1
100%

a. Toyota is the most popular type of car.
b. Holden was the least popular type of car.
c. See table

2.

a. 1/6
b. 2/6 or 1/3
c. 3/6 or 1/2

 Y7_Probability_answer_01.GIF

3. a. 6/10 or 3/5
b. 4/10 or 2/5
c. 0
d. 1

4.

a. 1 / 4

b. 1 / 8
c. 1 / 2
d. 25 times

Y7_Probability_answer_02.gif

5. a. 8 possible combinations.

b. 1/2 × 1/2 × 1/2 = 1/8

6,

Y7_Probability_answer_03.gif

7.

a. Y7_Probability_answer_04.gif

 

b. There are four possible combinations.

 

c. Y7_Probability_answer_05.gif

 

d. 3/10 × 7/10 = 21/ 100

e.Y7_Probability_answer_06.gif

 

f. 3/10 × 7/9 = 21 / 90