Answer:
(120 + 117) - 188
Explanation:
In order to determine how many more people work at the office than the factory, we'd find the difference between the total amount of people at both job sites:
Difference = total number of office employees - total number of factory workers
Since we're told that 120 men and 117 women work at the office, while 188 people work at the factory, we'd use the following equation:
(120 + 117) - 188