The times (in minutes) it took nine students to complete a quiz are $18$, $22$, $15$, $25$, $20$, $16$, $19$, $24$, and $21$. What are the mean and median times?

• A. Mean time: $20\text{ min}$Median time: $21\text{ min}$
• B. Mean time: $21\text{ min}$ Median time: $20\text{ min}$
• C. Mean time: $21\text{ min}$ Median time: $21\text{ min}$
• D. Mean time: $20\text{ min}$ Median time: $20\text{ min}$

Answer: (D)