Records show that Oliver is typically 10–30 minutes late for his shift at work. The distribution for the minutes he is late forms a consistent pattern, which can be graphed as the given uniform density curve. A uniform density curve is at y = startFraction 1 Over 20 EndFraction from 10 to 30.

What percentage of the time will Oliver arrive between 15 and 20 minutes late to work?

5%
16.7%
25%
50%