Final answer:
37.5% of the school population did not wear the school colors.
Step-by-step explanation:
To find the percentage of the school population that did not wear the school colors, we need to compare the number of students who did not wear the colors with the total population.
The total population is the sum of the students who wore the colors and those who did not.
So, the percentage of students who did not wear the school colors is:
Percentage = (Number of students who did not wear the colors / Total population) x 100
Given that 1000 students wore the school colors and 600 did not, the total population is 1000 + 600 = 1600.
Plugging these values into the formula:
Percentage = (600 / 1600) x 100
= 37.5%
Therefore, 37.5% of the school population did not wear the school colors.