PRODUCTION LINE	FIRST PRODUCTION LINE	Second PRODUCTION LINE	TOTAL
Configuration and installation of machines	60	75	135
Shipping and transportation	45	30	75
Maintenance and operation	35	55	90
Total	140	160	300

If an engineer is randomly summoned to the factory management:

What is the probability that this engineer is:

1- From the second production line

A. Engineers preparing and installing machines or shipping and transport engineers.

P from the second production line or from the maintenance and operation engineers.

4- From the first production line and from the engineers of preparing and installing machines