Probability intro

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# Probability intro - PowerPoint PPT Presentation

Probability scale. Certain. Probability intro. Intro Youtube Example - Youtube Example 1 Example 2 Example 3 Examples to try. Impossible. Probability scale. If I toss a coin twice what are is the probability that both coins are the same (That is two heads or two tails). Certain.

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Presentation Transcript

Probability scale

Certain

### Probability intro

Example 1

Example 2

Example 3

Examples to try

Impossible

JMG

Probability scale

If I toss a coin twice what are is the probability

that both coins are the same

(That is two heads or two tails)

Certain

Notice four things can happen

List all the possible outcomes

There are two things that make us happy

Impossible

JMG

Probability scale

If I shuffle a deck of 52 cards, what are the chances

That when I select a card I get a coloured card?

Certain

How many possible outcomes

We could pick any of 52 cards

There are twelve things that make us happy

{J,Q,K,♠J,♠Q,♠ K,♣J,♣Q,♣K,♥J, ♥Q, ♥K}

Calculator

Impossible

JMG

Probability scale

In my class there are 28 students and 26 students

Study French. If a student is chosen at random

From the class. What is the probability that this student

Studies French?

Certain

How many possible outcomes

We could pick any of 28 students

There are 26 things that make us happy

Students who study French

Calculator

Impossible

JMG

Probability scale

In my class there are 28 students and 16 students

Got A in Maths. If a student is chosen at random

From the class. What is the probability that this student

Did not get an A?

Certain

Make an estimate on the Probability scale first

Impossible

JMG

Probability scale

If I pick a card from a deck. What is the probability

That it is an ace?

Certain

Make an estimate on the Probability scale first

Impossible

JMG

Probability scale

The organisers of a raffle sell 1000 tickets.

The sell them all. What are the chances that

I will win first prize if I buy 5 tickets?

Certain

Make an estimate on the Probability scale first

At the raffle I fail to win first prize

What chances do I have of winning second prize?

Make an estimate on the Probability scale first

Impossible

JMG

48 students applied for a school trip to China.

There are only 28 places?

At the same time 78 students applied for a trip skiing

On which there are 46 places

I applied for both. Which trip do I

Have a better chance of getting?

Probability scale

Certain

Make an estimate on the Probability scale first

Impossible

What are your chances of getting both?

JMG