they all as a group will be doing 1/3 of the work. There are 4 robots.
how much will each individual robot will be doing from the total work?
well, how many times does 4 go into 1/3?
[tex]\bf \cfrac{\quad \frac{1}{3}\quad }{4}\implies \cfrac{\quad \frac{1}{3}\quad }{\frac{4}{1}}\implies \cfrac{1}{3}\cdot \cfrac{1}{4}\implies \cfrac{1}{12}\\\\
-------------------------------\\\\
\stackrel{first~robot}{\cfrac{1}{12}}+\stackrel{second~robot}{\cfrac{1}{12}}+\stackrel{third~robot}{\cfrac{1}{12}}+\stackrel{fourth~robot}{\cfrac{1}{12}}\implies \cfrac{4}{12}\implies \stackrel{\stackrel{total}{work}}{\cfrac{1}{3}}[/tex]
