Student: Anil can do a work in 15 days while Sunil can do it in 25 days. How long will they take if both work together?\nOptions:\n(A) 9 3/7 days\n(B) 9 7/8 days\n(C) 9 3/8 days\n(D) 4 3/8 days\n(E) 9 6/8 days.
Another student: Let's say, hmmm...

User
1/15 + 1/25 = 8/75\n75/8 = 9 3/8 days Final answer: (C).
Assistant