Final answer:
The percent increase in the number of students is 50%.
Step-by-step explanation:
To calculate the percent increase, you can use the formula:
% Increase = (New Value - Old Value) / Old Value * 100
In this case, the old value is 4,000 students and the new value is 6,000 students. Plugging these values into the formula, we get:
% Increase = (6,000 - 4,000) / 4,000 * 100 = 50%.
Therefore, the percent increase in the number of students is 50%.