Answer:
17
Step-by-step explanation:
100/6= approx. 16.666667. Since a person cannot be both living an a zombie, I'm just going to round up to 17 and subtract later if needed. So there are 17 zombies and 17*5=85 living people. Since there are 2 extra, I'm just going to subtract from the living people.
Zombies= 17
Living people= 83