School students were surveyed on their favourite brand of drink. The results are represented in the pie chart below.

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Worked solution

1. Check the total percentage shown in the pie chart

For a pie chart, all sectors should total $100\%$ .

$41\%+9\%+39\%+21\%=110\%$ .

This is impossible for one pie chart.

Answer

The percentages add up to $110\%$ , not $100\%$ .

1. State a valid correction to the percentage error

Since the percentages currently add up to $110\%$ , correct the pie chart by adjusting the percentages so that they add up to $100\%$ .

Answer

Change one or more of the percentages so that the total is $100\%$ .

AI analysis — may contain mistakes.

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