Question

X can do a work in the same time in which Y and Z together can do it. If X and Y together can do it in
10 days and Z alone can do it in 50 days, how many days will Y require to do the work alone?
(B) 30
(C) 45
(D) 55 (E) none of these​

Answer 1

Answer:

i think it is 20 days.

i am write