A and B complete a work in 3 days. A alone can do it in 9 days. If both together can do the work in how many days? Select.
A) 3.75 days	B) 4.75 days	C) 3.25 days	D) 3.15 days	E) 2.75 days
1/3 + 1/9 = 4/9   9/4 = 4.75 days   Answer: 4.75 days
<result>B</result>
A and B complete a work in 3 days. A alone can do it in 9 days. If both together can do the work in how many days?