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L1 Probability Starters Links Probability Starter 1 Probability Starter 1 Solns Probability Starter 2 Probability Starter 2 Solns Probability Starter 3 Probability Starter 3 Solns Probability Starter 4 Probability Starter 4 Solns Probability Starter 5 Probability Starter 5 Solns Probability Starter 6 Probability Starter 6 Solns Probability Starter 7 Probability Starter 7 Solns A B C

L1 Probability Starters Links Probability Starter 1Probability Starter 1 Probability Starter 1 SolnsProbability Starter 1 Solns Probability Starter 2Probability

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L1 Probability StartersLinks

Probability Starter 1 Probability Starter 1 Solns

Probability Starter 2 Probability Starter 2 Solns

Probability Starter 3 Probability Starter 3 Solns

Probability Starter 4 Probability Starter 4 Solns

Probability Starter 5 Probability Starter 5 Solns

Probability Starter 6 Probability Starter 6 Solns

Probability Starter 7 Probability Starter 7 Solns

Probability Starter 8 Probability Starter 8 solns

Probability Starter 9 Probability Starter 9 solns

Probability Starter 10 Probability Starter 10 solns

A

BC

1st slide

1)

2)

5)

3)

4)

Find the probability of being a Boy

Boys Girls Totals

Cat 12 8 20

Dog 16 14 30

28 22 50

Favourite pets

Find the probability of a Dog being favourite pet

Find the probability that a Boy has a Cat as favourite pet

Find the probability of being a girl, given that a dog is a favourite pet

Find the probability of being a Boy and having a Cat as favourite pet

Probability Starter 1

Probability Starter 1 Solns

1)

2)

5)

3)

4)

Find the probability of being a Boy

Boys Girls Totals

Cat 12 8 20

Dog 16 14 30

28 22 50

Favourite pets

Find the probability of a Dog being favourite pet

Find the probability that a Boy has a Cat as favourite pet

Find the probability of being a girl, given that a dog is a favourite pet

Find the probability of being a Boy and having a Cat as favourite pet

1st slide

Probability Starter 2

1)

2)

5)

3)

4)

Find the probability getting ‘A’ on both spins

A simple lottery wheels is spun twice

Find the probability spinning a ‘B’ or a ‘C’

Find the probability of the two spins being in alphabetical order

Find the probability of spelling CAB in 3 spins

Find the probability of spinning a pair the same

AB

C

1st slide

Probability Starter 2 Solns

1)

2)

5)

3)

4)

Find the probability getting ‘A’ on both spins

A simple lottery wheels is spun twice

Find the probability spinning a ‘B’ or a ‘C’

Find the probability of the two spins being in alphabetical order

Find the probability of spelling CAB in 3 spins

Find the probability of spinning a pair the same

AB

C

1st slide

Probability Starter 3

1)

2)

5)

3)

4)

Find the probability getting a ‘star’ card first

A shop runs a promotion with one of 5 cards given with each purchase (there are a very large number of cards)

Find the probability of getting a yellow card first

If you select a blue card, what's the chance it is a moon?

Find the probability of getting a blue card first, then a red card

Find the probability of getting two stars in a row

1st slide

Probability Starter 3 Solns

1)

2)

5)

3)

4)

Find the probability getting a ‘star’ card first

A shop runs a promotion with one of 5 cards given with each purchase (there are a very large number of cards)

Find the probability of getting a yellow card first

If you select a blue card, what's the chance it is a moon?

Find the probability of getting a blue card first, then a red card

Find the probability of getting two stars in a row

1st slide

Probability Starter 4

1)

2)

5)

3)

4)

Find the probability getting a red card first

Two cards are selected at random

from this hand

Find the probability of getting an Ace or Queen first

If you select a Queen first, what's the chance of getting a Queen 2nd

Find the probability of getting a 4 first, then a 6 next

Find the probability of getting two Queens

1st slide

Probability Starter 4 Solns

1)

2)

5)

3)

4)

Find the probability getting a red card first

Two cards are selected at random

from this hand

Find the probability of getting an Ace or Queen first

If you select a Queen first, what's the chance of getting a Queen 2nd

Find the probability of getting a 4 first, then a 6 next

Find the probability of getting two Queens

1st slide

Probability Starter 5

1)

2)

5)

3)

4)

Find the probability of Bill getting a 4 OR 5

Bill rolls a dice

Find the probability of Bill getting a 5 and Ted getting a 1

Find the probability of Bill & Ted getting the same result

Find the probability of Ted rolling a score greater than Bills roll

Ted rolls a dice

Find the probability of Ted rolling twice Bills roll

1st slide

Probability Starter 5 Solns

1)

2)

5)

3)

4)

Find the probability of Bill getting a 4 OR 5

Bill rolls a dice

Find the probability of Bill getting a 5 and Ted getting a 1

Find the probability of Bill & Ted getting the same result

Find the probability of Ted rolling a score greater than Bills roll

Ted rolls a dice

Find the probability of Ted rolling twice Bills roll

1st slide

Probability Starter 6

1)

2)

5)

3)

4)

Copy & complete the probability tree

Find the probability of MTB crash and being late

Find the probability of being late

Find the probability of being late IF there was no crash

Given that I crash my MTB find the probability of being on time

MTB crash

Nocrash

Late

On time

Late

On time

0.15

0.8

0.05

1st slide

Probability Starter 6 Solns

1)

2)

5)

3)

4)

Copy & complete the probability tree

Find the probability of MTB crash and being late

Find the probability of being late

Find the probability of being late IF there was no crash

Given that I crash my MTB find the probability of being on time

MTB crash

Nocrash

Late

On time

Late

On time

0.15

0.8

0.05

0.95

0.2

0.85

1st slide

Probability Starter 7

1)

2)

5)

3)

4)

Find the probability of the first spin being a 4

Find the probability of the two spins being the same number

Find the probability of the two spins adding to 8

Find the probability the first spin being greater than the 2nd

2

54

3A numbered lottery spinner is spun twice

Find the probability of the two spins adding to 7

1st slide

Probability Starter 7 Solns

1)

2)

5)

3)

4)

Find the probability of the first spin being a 4

Find the probability of the two spins adding to 8

Find the probability the first spin being greater than the 2nd

2

54

3A numbered lottery spinner is spun twice

Find the probability of the two spins adding to 7

Find the probability of the two spins being the same number

1st slide

Probability Starter 8

1)

2)

5)

3)

4)

Copy & complete the probability tree

Find the probability of doing no study & passing the test

Find the probability of passing the test

35% of people who study & pass the test get ‘merit’ What is the chance of this happening?

What is the chance of passing and not getting a ‘merit’ given that a student did study for the test.

Study

Nostudy

Passed

No Pass

Passed

No Pass

0.7

0.8

70% of students study for a test. 80% of those who did study passed the test, but only 45% of those who no study passed the test

1st slide

Probability Starter 8 solns

1)

2)

5)

3)

4)

Copy & complete the probability tree

Find the probability of doing no study & passing the test

Find the probability of passing the test

35% of people who study & pass the test get ‘merit’ What is the chance of this happening?

What is the chance of passing and not getting a ‘merit’ given that a student did study for the test.

Study

Nostudy

Passed

No Pass

Passed

No Pass

0.7

0.8

0.45

70% of students study for a test. 80% of those who did study passed the test, but only 45% of those who no study passed the test

0.55

0.2

0.3

1st slide

Probability Starter 9

1)

2)

5)

3)

4)

Copy & complete the probability tree

Find the probability of a duck being shot at & living

Find the probability of a duck living

70% of ducks who die when shot at are found by the hunter. What is the chance of this happening?

If a duck was shot at, what is the chance of a duck not being found by the hunter?

Shot at

Not shot at

Die

Live

Die

Live

0.1

0.04

10% of ducks get shot at during the duck shooting season – Of these 80% are killed. 4% of ducks not shot at, die of fright.

1st slide

Probability Starter 9 solns

1)

2)

5)

3)

4)

Copy & complete the probability tree

Find the probability of a duck being shot at & living

Find the probability of a duck living

70% of ducks who die when shot at are found by the hunter. What is the chance of this happening?

If a duck was shot at, what is the chance of a duck not being found by the hunter?

Shot at

Not shot at

Die

Live

Die

Live

0.1

0.8

0.04

10% of ducks get shot at during the duck shooting season – Of these 80% are killed. 4% of ducks not shot at, die of fright.

0.96

0.2

0.9

1st slide

Probability Starter 10

Design a simulation to find the chance of an injury on a rainy day

Tool:

Trial:

Record:

There is a 20% chance of a car crash on a rainy day. 45% of these crashes involve injury to the people in the car

Calculate:

1st slide

Probability Starter 10 solns

Design a simulation to find the chance of an injury on a rainy day

Tool:

Trial:

Record:

There is a 20% chance of a car crash on a rainy day. 45% of these crashes involve injury to the people in the car

Calculate:

1st slide