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# Exercises on Section 2

The following exercises provide extra practice on the topics covered in Section 2.

## Exercise 4 A combined batch of camera prices

Find the mean price of the batch formed by combining the following two batches, and , of camera prices.

### Discussion

Mean price of all the cameras is

which is £79.3 (rounded to the same accuracy as the original means).

## Exercise 5 The mean price of fabric

Suppose you buy 8.5 metres of fabric in a sale, at £10.95 per metre, to make some bedroom curtains. The following year you decide to make a matching bedspread and so you buy 6 metres of the same material, but the price is now £12.70 per metre. Calculate the mean price of all the material, in £ per metre.

### Discussion

Mean price of all the material is

which is £11.67 (rounded to the nearest penny).