The following pie chart shows the different coloured dresses worn by 60 students in a college party. Study the pie chart and answer the question that follows.

The degrees (central angle) for the blue coloured dress (sector which represents 40%) is:

To find the degrees (central angle) corresponding to the blue-colored dress, which represents 40% of the total, we use the following formula:
Degrees = (Percentage / 100) × 360 

Solution:
Degrees = (40 / 100) × 360 = 0.4 × 360 = 144 degrees
Therefore, the central angle for the blue-colored dress is 144 degrees.​​