Kathleen can paint a room in 2 hours, and Anthony can paint an identical room in 3 hours. How many hours would it take Kathleen and Anthony to paint both rooms if they work together at their respective rates? Choose one.
A) 8/15
B) 4/3
C) 12/5
D) 9/4
E) 15/4
(1/2 + 1/3)t=2   t=12/5   Answer: 12/5
<result>C</result>
Kathleen can paint a room in 2 hours, and Anthony can paint an identical room in 3 hours. How many hours would it take Kathleen and Anthony to paint both rooms if they work together at their respective rates?