Q:

A, B and C complete a work in 10, 12 and 15 days respectively. They started the work together. But A left the work before 5 days of its completion. B also left the work 2 days after A left. In how many days will the work completed? 

• 1
  5 days
• 2
  9 days
• 3
  7 days
• 4
  12 days