The pie charts give information about the ages, in years, of people living in two towns, Adley and Bridford - Edexcel - GCSE Maths - Question 11 - 2017 - Paper 2

Now, we assume a total population of 250 people in Adley based on the pie chart's representation. Hence, the number of people aged 0 – 19 in Adley can be calculated as:

$\text{Number of people aged 0 – 19} = \frac{1}{5} \times 250 = 50$

Next, we need to find the total population of Bridford. Assuming the population of Bridford is 300 based on the areas represented in the pie chart, the total population for both towns is:

$\text{Total Population} = \text{Population in Adley} + \text{Population in Bridford} = 250 + 300 = 550$

Now, we can calculate the proportion of people aged 0 – 19 in relation to the total population of both towns:

$\text{Proportion aged 0 – 19} = \frac{50}{550} = 0.0909\ldots$

Converting this to three significant figures, we get:

$0.0909 \approx 0.091$