Probability Answers

a. 1⁄13

b. 1⁄52

c. 1⁄4

d. 3⁄13

e. 1

  

2

a. 0.125

b. 0.25

c. 0.5
3
Car colour

Number of cars

Frequency (f)

Relative frequency

(fraction)

Relative frequency

(decimal)

Relative frequency

(percentage)
white
34
34/200 = 17/100
0.17
17%
red
62
62/200 = 31/100
0.31
31%
black
28
28/200 = 7/50
0.14
14%
green
46
46/200 = 23/100
0.23
23%
other
30
30/200 = 3/20
0.15
15%
total
200
1
1.00
100%

4

a. 1⁄7

b. 2⁄7

  

5

750

    

6

a. 2⁄3

b. 1⁄3

c. 0

7

a. {(T, T), (T, H), (H, H), (H, T)}

b. (i) 1⁄4

(ii) 3⁄4

8

a. 20

b. 30

c. 30