Probability Trees

Probability Trees

Each section of the diagram should add up to a full one.

So in this case 0.7 + 0.3 = 1

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Each additional section of the diagram should add up to a full one.

So in this case 0.6 + 0.4 = 1

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Labelling

All probabilities must sum to 1, complete the two parts of the diagram.

Drag labels to their correct position on the image

0.7

0.25

0.8

0.25

Labelling

The diagram shows the chances of getting green and blue counters from a bag. Complete the section for the first counter.

Drag labels to their correct position on the image

8/1

1/7

1/8

1/9

7/8

Labelling

The diagram shows the chances of getting green and blue counters from a bag. Complete the diagram

Drag labels to their correct position on the image

1/9

8/1

1/8

7/8

1/7

Multiple Choice

What are the chances it will rain on both Monday and Tuesday?

• 0.32

• 0.08

• 0.48

• 0.12

Multiple Choice

What are the chances it will not rain on either Monday and Tuesday?

• 0.32

• 0.08

• 0.48

• 0.12

Multiple Choice

What are the chances it will not rain on Monday but will rain on Tuesday?

• 0.32

• 0.08

• 0.48

• 0.12

Multiple Choice

What are the chances it will only rain on one of the days?

• 0.56

• 0.08

• 0.48

• 0.4

Multiple Choice

The tree diagram shows the chances of two people's cards arriving on time. What are the chances they both arrive on time?

• 9/13

• 14/30

• 9/30

• 21/20

Multiple Choice

The tree diagram shows the chances of two people's cards arriving on time. What are the chances both are late?

• 3/30

• 7/30

• 6/30

• 3/10

Multiple Choice

The tree diagram shows the chances of two people's cards arriving on time. What are the chances one is late and one is on time?

• 1/30

• 7/30

• 6/30

• 13/30