Number 30 and 33 on the District 2 2010 test(don't know how to type it out)
TMSCA Test 6 #51:
Harry Up ran the first stage of the race at an average speed of 6 mph, the second stage at an average speed of 5 mph, and the final stage at an average speed of 4 mph. What was his average speed for all three stages if each stage was the same distance?
Answer: 4.86 mph