Revision check Chapter 8 Probability
A new car comes in 3 different engine sizes.
There is a choice of 5 colours.
How many different options are available?
See page 123
The Fundamental Principle of Counting
8
15
5
35
What is the probability
of picking a yellow disc?
3
     4
3     7
3  
     8
a.
What is the probability
of picking a yellow disc?
1
     2
3     3
3       7
What is the probability
of picking a yellow
or a blue disc?
2
     3
5
     7
3       7
Match the correct letter to the statement
0
The probability that you get a head when tossing a coin
A
A
0.5
B
B
C
1
C
Match the correct letter to the statement
0
A
The probability that you get a number less
than 7 when rolling an ordinary dice
A
B
0.5
B
C
1
C
What is the probability that it is an A ?
A letter is chosen at random from the word
2    11
MATHEMATICS
1
    11
2     9
What is the probability that it is a vowel ?
A letter is chosen at random from the word
4
    11
MATHEMATICS
3
    11
3
     7
The probability that she picks a white marble is ¼
How many white marbles does she have?
Jane has 20 marbles.
Some are black, some are white and some are red
2
3
4
5
Rolls
20
10
30
40
50
60
Sean is doing an experiment to see if
a coin is biased
Total heads
13
19
24
31
39
7
Is the coin baised?
No
Yes
Michael spins a spinner 10 times
He gets the letter B six times.
How many times would he
expect to get the letter B
 if he did 30 spins?
12
18
20
24
What is the relative frequency of getting blue?
Green
Results from choosing a disc 20 times
10
Yellow
3
7
Blue
7
John has a 3 sided spinner with 1,2 and 3 on it.
He also has a 4-sided spinner with 2,4,5 and 6 on it.
He spins both spinners and adds the score.
What is the probability of scoring 7?
+
2
4
5
6
1
3
4
6
7
2
4
8
6
7
7
3
8
5
9
12
What is the missing value
 in the table?
1
3
2
4
The table shows the
probabilites that the arrow
will land on each number.
0.1
Score
2
4
1
3
0.2
0.3
Probability
0.4
0.3
0.2
0.1
 ?
The probability that player A will win the
tennis match is ⅛
What is the probability that player A will lose?
8
The probability that team A will win the
football match is 3/10.
The probability that team A will lose is 6/10
What is the probability that player A will draw?
10
Complete the probability
tree diagram.
There are 9 discs in a bag.
4 are red and 5 are green.
One disc is taken out.
Green
Red
4
9
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