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problem

Racing odds

11 to 14

In a race the odds are: 2 to 1 against the rhinoceros winning and 3 to 2 against the hippopotamus winning. What are the odds against the elephant winning if the race is fair?

problem

Is your DNA unique?

16 to 18

Use combinatoric probabilities to work out the probability that you are genetically unique!

article

Tree diagrams, 2-way tables and Venn diagrams

11 to 18

Representing frequencies and probabilities diagrammatically, and using the diagrams as interpretive tools.

problem

Any win for tennis?

16 to 18

What are your chances of winning a game of tennis?

problem

Favourite

Teams

16 to 18

Two brothers belong to a club with 10 members. Four are selected for a match. Find the probability that both brothers are selected.

problem

Strange dice

11 to 14

If two of these unusually numbered dice are thrown, how many different sums are possible?

article

Why start with tree diagrams?

11 to 14

Why the tree diagram is fundamental to studying probability - and why it should be introduced right from the start.

problem

Coin lines

14 to 16

If a coin rolls and lands on a set of concentric circles what is the chance that the coin touches a line ?

problem

Molecular sequencer

14 to 18

Investigate the molecular masses in this sequence of molecules and deduce which molecule has been analysed in the mass spectrometer.

problem

You never get a six

7 to 11

Charlie thinks that a six comes up less often than the other numbers on the dice. Have a look at the results of the test his class did to see if he was right.

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Racing odds

Is your DNA unique?

Tree diagrams, 2-way tables and Venn diagrams

Any win for tennis?

Teams

Strange dice

Why start with tree diagrams?

Coin lines

Molecular sequencer

You never get a six