Student: 10 men can complete a piece of work in 15 days and 15 women can complete the same work in 12 days. If all the 10 men and 15 women work together, in how many days will the work get completed?
Options:
(A) 6
(B) 7 23
(C) 6 23
(D) 6 13
(E) None of these.
Another student: Let's say, hmmm...
10 men + 15 women in 1 day do 115 + 112 = 960 work
\ Time taken = 609 days = 623 days Final answer: (C).