Transcript probability lesson3

Probability
How likely is an event to occur?
What are the chances of that
happening??!!
Lesson
objectives:

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?
We discussed these:

If you toss a coin you have an equal chance of
getting a head or a tail. Heads or tails 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.
We are going to investigate whether we have an
equal number of heads and tails when we toss a
coin 30 times.
We will also investigate whether we get an equal
number of 1s, 2s, 3s, 4, 5s and 6s when we roll a
dice 30 times.
We will record our findings.
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 out
learning objectives
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?!!!