Answer: 792
Explanation:
Given : Hugo and Viviana work in an office with ten other coworkers.
Out of these 12 workers, their boss needs to choose a group of five to work together on a project.
The combination of n thing taking m at a time is given by :-

Then, the number of different working groups of five the boss can choose :-

Hence, the number of different working groups of five the boss can choose = 792.