# A Chance Line

In this worksheet, students decide how likely an event is to happen using a probability scale.

Key stage:  KS 2

Curriculum topic:   Maths and Numerical Reasoning

Curriculum subtopic:   Probability

Difficulty level:

### QUESTION 1 of 10

Probability is measured on a scale from 0 to 1.

If something is impossible, it has a probability of 0 that it will happen.

If something is just as likely to happen as not (even chance), it has a probability of ½ that it will happen.

If something is certain, it has a probability of 1 that it will happen.

Which letter on this scale represents the word CERTAIN when we are talking about the chance of something happening.

A

B

C

D

E

F

Which letter on this scale represents the word IMPOSSIBLE when we are talking about the chance of something happening.

A

B

C

D

E

F

Which letter on this scale represents the word UNLIKELY when we are talking about the chance of something happening.

A

B

C

D

E

F

Which letter on this scale represents an EVEN CHANCE when we are talking about the chance of something happening.

A

B

C

D

E

F

Which letter on this scale represents the words VERY LIKELY when we are talking about the chance of something happening.

A

B

C

D

E

F

Which letter on this scale represents the word LIKELY when we are talking about the chance of something happening.

A

B

C

D

E

F

Which letter on this scale represents the chance that you will be younger this evening than you were this morning.

A

B

C

D

E

F

Which letter on this scale represents the chance that you will get tails when you throw a fair coin.

A

B

C

D

E

F

Which letter on this scale represents the chance that there will be an aeroplane at Heathrow Airport right now.

A

B

C

D

E

F

Which letter on this scale represents the chance that the author of this question was born on a Monday?

A

B

C

D

E

F

• Question 1

Which letter on this scale represents the word CERTAIN when we are talking about the chance of something happening.

F
EDDIE SAYS
You cant get something that is more likely to happen that being certain
• Question 2

Which letter on this scale represents the word IMPOSSIBLE when we are talking about the chance of something happening.

A
EDDIE SAYS
You can\'t get something less likely to happen than impossible
• Question 3

Which letter on this scale represents the word UNLIKELY when we are talking about the chance of something happening.

B
EDDIE SAYS
Unlikely must be on the lower end of the scale
• Question 4

Which letter on this scale represents an EVEN CHANCE when we are talking about the chance of something happening.

C
EDDIE SAYS
Evan chance means it has an equal chance of happening and not happening
• Question 5

Which letter on this scale represents the words VERY LIKELY when we are talking about the chance of something happening.

E
EDDIE SAYS
Likely must be above the middle, very likley must be towards the top of the scale
• Question 6

Which letter on this scale represents the word LIKELY when we are talking about the chance of something happening.

D
EDDIE SAYS
Likely must be in the top half of the scale
• Question 7

Which letter on this scale represents the chance that you will be younger this evening than you were this morning.

A
EDDIE SAYS
Is it possible to get younger?
• Question 8

Which letter on this scale represents the chance that you will get tails when you throw a fair coin.

C
EDDIE SAYS
A fair coin has an even chance of landing on wither heads or tails
• Question 9

Which letter on this scale represents the chance that there will be an aeroplane at Heathrow Airport right now.

F
EDDIE SAYS
Heathrow runs 24 hours a day, can you imagine there not being one there?
• Question 10

Which letter on this scale represents the chance that the author of this question was born on a Monday?

B
EDDIE SAYS
Monday is one day out of seven. Do you think this is likely?
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