Answer:
12 project managers.
Explanation:
There are 8 engineers for every team leader. So, since Mr. Wells employed 15 team leaders;
the number of engineers = 15 x 8
= 120
There are 120 engineers in the project record.
There are 5 project managers for every 50 engineers. Then;
The number of engineers = 50 + 50 + 20
= 120
So that,
The number of project managers = 5 + 5 +2
= 12
Therefore, Mr. Wells employed 12 project managers.