Molly can do a task in 15 days while Sandy can do the task in 10 days. How many days will it take to complete the task if both work together?	Choose the correct choice from the following choices:
A) 6 B) 7 C) 7.5 D) 8 E) 9
Each day, Molly can do 1/15 of the task.   Each day, Sandy can do 1/10 of the task.   Each day, they can do 1/15 + 1/10 = 1/6 of the task.   The task will be completed in 6 days.   The answer is 6.
<result>A</result>
Molly can do a task in 15 days while Sandy can do the task in 10 days. How many days will it take to complete the task if both work together?