The Likelihood Scale
Monday, 06 June 2011
If something cannot
happen then it is
said to be
impossible and has
no chance “0”
If something has a “50
50” chance of happening
then it is said to have an
even chance “”
If something is definitely
going to happen the it is
a certainty and has 100%
chance of happening “1”
0

1
Impossible
Even Chance
Certainty
Less Likely
More Likely
Event A: A fair coin is thrown once.
Place on the likelihood scale the likelihood of it landing
heads up.
0

1
Impossible
Even Chance
Certainty
Less Likely
More Likely
Event B: Having Mathematics homework.
Place on the likelihood scale the likelihood of you getting
Mathematics homework tonight.
0

1
Impossible
Even Chance
Certainty
Less Likely
More Likely
Event C: Becoming a Millionaire someday.
Place on the likelihood scale the likelihood of you becoming a
millionaire someday.
0

1
Impossible
Even Chance
Certainty
Less Likely
More Likely
Event D: A spinner is spun
Place on the likelihood scale the likelihood of the
spinner landing on 3.
0

1
Impossible
Even Chance
Certainty
Less Likely
More Likely
A bag containing the following items is accidentally dropped on the floor.
Place on the likelihood scale the likelihood of each item being broken.
D
A
B
F
C
E
0

1
Impossible
Even Chance
Certainty
Less Likely
More Likely