Compare the efficiency of three electricians in installing lights.
a) Electrician #1: 20 hours, 30 lights
b) Electrician #2: 30 hours, 35 lights
c) Electrician #3: 40 hours, 40 lights
Which electrician is the most efficient in installing lights?
a) Electrician #1
b) Electrician #2
c) Electrician #3