2. One under each wing.
A Boeing 747 has four engines.
The Boeing 747 has at least 4 engines.
The Boeing 777 has at least 2 engines.
the Boeing 777 has a twin engine system (2 engines).
The Boeing 737 NG has 2 engines (CFM International CFM56)
The Boeing 747 uses four engines.
Four.
2
two
A 747 has 4 engines, the 777 has 2.
2
It has 4 propulsion engines and one APU.