Applied Mathematic
(Preliminary General 1)
Probability
in Words
Stage 6 - Year 11
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1
Probabilities range from 0 to 1.
They can be written in words.
P(Sun rising tomorrow) =
P(Me flying unaided) =
1 = Certain
0 = Impossible
P(Tossing a head) = 0.5 = Fifty/Fifty
2
1 Certain
Very Likely
Likely
1
2 Fifty/Fifty
Unlikely
Very Unlikely
0 Impossible
4
P(E) =
9
Unlikely
1
P(E) =
10
Very Unlikely
11
P(E) =
12
Very Likely
13
P(E) =
13
Certain
3
Examples
1. Tossing a dice and getting a negative
number. P(E) = 0
Impossible
2. Tossing a dice and getting a positive
Certain
number. P(E) = 1
3. Tossing a dice and getting an odd
number. P(E) = 0.5 Fifty/Fifty
4
Examples
4. A bag contains 5 blue, 1 green and 4
red disks.
a. What is the probability of a green?
P(E) = 0.1
Very Unlikely
b. What is the probability of a blue?
P(E) = 0.5
Fifty/Fifty
c. What is the probability of not green?
P(E) = 0.9
Very Likely
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