Probability
How likely is an event to occur?
What are the chances of that
happening??!!
Learning
Intention:

To understand the terms ‘equal chance’
and ‘outcome’ when thinking about
probability.

To complete a maths investigation
involving tossing a coin and rolling a dice!
- to test the ‘equal chance’ theory!
Mathematical
Vocabulary

We can describe the probability or chance of an
event happening by saying:
 It is IMPOSSIBLE.
 It is UNLIKELY.
 It is LIKELY.
 It is CERTAIN.
Some events have an equal
chance of happening or not
happening.
Can you think
of any?
Outcomes:

If you toss a coin you have an equal chance of
getting a head or a tiki. Heads or tikis are the
‘outcomes’.

If a baby is born it has an equal chance of being a
boy or a girl. Boy or girl are the ‘outcomes’.

If you roll a dice you have an equal chance of
getting the number 1, 2, 3, 4, 5 or 6! These scores
are the ‘outcomes’.
Today’s task:



We are going to carry out a maths investigation.
You will investigate about whether we have an
equal number of heads and tikis when we toss a
coin 30 times.
Or you will investigate whether we get an equal
number of 1s, 2s, 3s, 4, 5s and 6s when we roll a
dice 30 times.
What do you
think we will
find out?
Perhaps we will have 15 heads and 15 tails when
we toss our coin 30 times??
 Perhaps we will have each number on the dice 5
times. (five scores of 1, five scores of 2 etc.)


It’s up to you to find out!!!!
Did we achieve our
learning Intentions
today?


We understand what is meant by the terms
‘equal chance’ and ‘outcomes’.
We have carried out an investigation into ‘equal
chance’.

We have recorded our findings.
Things to think
about!

If we rolled 2 coins what possible outcomes
could we get?

If we rolled more than 1 dice what possible
outcomes could we get?

What would our chances of getting 2 heads or a
6 be like then?!!!
Wednesday
Probability
Lesson 2
Coin
Heads
Tiki
Tally
Total
Dice
1
2
3
4
5
6
Tally
Total
Cube
Colour
Colour
Colour
Colour
Tally
Total Out of 20
100%
10/10
Write your own
sentences for the
probability of
100%
My ‘it’ list
Add the strengths
Add the weaknesses
My new ideas (S.W)