# Probability How likely is an event to occur? happening??!!

## Probability

How likely is an event to occur?

What are the chances of that happening??!!

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.

What is the probability of the following events happening?

• You will have your 30 th birthday tomorrow.

• Your family will win the lottery this weekend.

• You will watch television tonight.

• You will eat some food today.

Can you think of any events which are equally likely to happen?

• If you toss a coin you have an equal chance of getting a head or a tail.

• If a baby is born it has an equal chance of being a boy or a girl.

• If you roll a dice you have an equal chance of getting the number 1, 2, 3, 4, 5 or 6!

Investigation

• Next lesson we will investigate probability further!!

• We test whether we have an equal number of heads and tails when we toss a coin.

• We will test whether we get an equal number of 1s, 2s, 3s, 4, 5s and 6s when we roll a dice.