Working alone, printers X, Y, and Z can do a certain printing job, consisting of a large number of pages, in 8, 12, and 16 hours, respectively. What is the ratio of the time it takes printer X to do the job working alone at its rate, to the time it takes printers Y and Z to do the job working together at their individual rates?

Working alone, printers X, Y, and Z can do a certain printing job, consisting of a large number of pages, in 8, 12, and 16 hours, respectively. What is the ratio of the time it takes printer X to do the job working alone at its rate, to the time it takes printers Y and Z to do the job working together at their individual rates?

1. 411
2. 76
3. 1522
4. 2215
5. 114

Jawaban: 2