SAT Question a067c926: Distributions, Center & Spread answer and explanation with Desmos solution

Choice D is correct. It's given that the bar graph shows the number of students from one school who were born in either July, August, September, or October. The bar representing the number of students born in August has a height of $50$; therefore, $50$ students were born in August. The bar representing the number of students born in July has a height of $40$; therefore, $40$ students were born in July. Thus, there were $50-40$, or $10$ more students born in August than in July.