The pie chart shows the colours of the dresses worn by 120 students at a college party.
What is the difference between the number of students who wore grey dresses and the number who wore yellow dresses?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 12
The difference of two sectors is the difference of their percentages, taken of the 120 students.
Grey \(=20\%\), yellow \(=10\%\)
Difference \(=20\%-10\%=10\%\) of \(120=12\)