Tabby is training for a triathlon. She swims at a speed of 1 mile per hour. She runs at a speed of 9 miles per hour. She wants to figure out her average speed for these two events. What is the correct answer for her?
Choose the most appropriate option:	A) 8 mph	B) 5.25 mph	C) 3.5 mph	D) 5 mph	E) 0.5 mph
(1 mph +9 mph)/2 = 5 mph   Correct option is: 5 mph
<result>D</result>
Tabby is training for a triathlon. She swims at a speed of 1 mile per hour. She runs at a speed of 9 miles per hour. She wants to figure out her average speed for these two events. What is the correct answer for her?