Usually 12, when using a full 60-piece string section.
A full orchestra generally uses 12 violas.
It always depends on the piece being played and the size of the venue to be performed in.
There can be any number of violas in an orchestra. It most commonly depends on the conductor.
None
As of 2007 the National Symphony Orchestra of Peru had ninety members.
KBS Symphony Orchestra was created in 1956.
One or two. Usually one. Actually, if there is a piano, it is a guest artist and not a part of the orchestra. There are no pianos in a symphony orchestra
100
It all depends on how large the orchestra is. There isn't really a definite answer to this question
There is 1 triangle in a symphony orchestra and a 2 in a orchestra
A full symphony orchestra could easily have 80 people.
Four