Given people and resources how many days does it take for the work to be completed?

Question

A group of workers estimate to finish a work in 10 days, but 5 workers could not join the work. If the rest of them finished the work in 12 days, the number of members present in the team originally is

(a) 50                                                        (c) 35

(b) 45                                                        (d) 30