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What instruments do they play in an orchestra?
An orchestra combines instruments such as violin, viola, cello, double bass, horn, trumpet, trombone, tuba, flute, oboe, clarinet, bassoon, timpani, bass drum, triangle, snare drum, cymbals, and mallet percussion instruments.
Are any other instruments played along with an orchestra besides the string, brass, and percussion instruments?
Other instruments such as the piano, harp and celesta may sometimes appear in an orchestra.
Are there different types of orchestras?
A full-size Western orchestra may sometimes be called a symphony orchestra or philharmonic orchestra.
Is there another type of orchestra besides symphony or philharmonic?
Amateur orchestras include those made up of students from an elementary school or a high school, youth orchestras, and community orchestras.
Are there any other types of orchestras besides symphony and philharmonic?
Chamber or concert orchestra usually refers to smaller-sized ensembles; a major chamber orchestra might employ as many as fifty musicians and some are much smaller than that.

Question: How big are most orchestras?
Self-contained rewrite: How big are most orchestras?