At National School, 50% of the students have bicycles. Of the students who have bicycles, 30% have black bicycles. What percent of students of National School have black bicycles?

Explanation

To solve the question, we first determine the percentage of students who have bicycles. The question states that 50% of the students have bicycles. Next, we find the percentage of those students who have black bicycles. The question tells us that 30% of the students with bicycles have black ones.To find the overall percentage of students who have black bicycles, we multiply the two percentages together: 50% * 30% = 0.5 * 0.3 = 0.15, which corresponds to 15%.Therefore, 15% of the students at National School have black bicycles. The other options (20%, 25%, and 46%) are incorrect because they do not correctly multiply the percentages provided in the question.