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### Number and algebra

### Geometry and measure

### Probability and statistics

### Working mathematically

### For younger learners

### Advanced mathematics

# In the Bag

The sets of 10 marbles are chosen randomly, so could contain:

4 red, 3 green, 2 blue and 1 yellow or

4 red, 3 green and 3 yellow or

7 red and 3 blue or...

A run of 10 viewings may produce an outcome that is not representative of the actual contents of the bag.

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Age 11 to 14

Challenge Level

- Problem
- Getting Started
- Student Solutions
- Teachers' Resources

The sets of 10 marbles are chosen randomly, so could contain:

4 red, 3 green, 2 blue and 1 yellow or

4 red, 3 green and 3 yellow or

7 red and 3 blue or...

A run of 10 viewings may produce an outcome that is not representative of the actual contents of the bag.

This problem offers you two ways to test reactions - use them to investigate your ideas about speeds of reaction.

We're excited about this new program for drawing beautiful mathematical designs. Can you work out how we made our first few pictures and, even better, share your most elegant solutions with us?