It depends on the orchestra. In full big band, there are 4 or 5 depending on what arrangements you play.
In a symphonic orchestra or symphony there can be zero or as many as 8 or 10 depending on what music they are playing.
It's all based on how many trumpets any particular arrangement of music has parts for.
there is four modern trumpets
3 bassoon, 1 Contrabassoon
36 trumpets
Orchestra
The standard version uses four trumpets.
Strings
The Philippine Philharmonic Ochestra has 66 regular members.
A typical gamelan orchestra can consist of around 20 to 30 musicians but can vary in size depending on the type of gamelan and the specific music being performed.
depends on the piece
as many as you want
it really depends on how many GOOD trumpets are in a band. I would say about 12. I t aslso depends on the size of the band.
To the immediate left of the conductor.