Probability Put to the Test

23 11 2013

This is the problem Year 7 were given this week.

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A variety of theories were suggested such as sort the marbles by colour. Put half the marbles on the bottom of one bowl and half on the bottom of the other. Then carefully add half the white marbles to the top of the black marbles in each bowl.
OR
Put the black marbles into a can of white paint
OR
Put one white marble into your mouth and cough it into your hand at the appropriate time.
One student supported the correct response with this working.

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