Pitched and unpitched instruments.
Pitched and unpitched percussion.
strings and nonstring instruments
Percussion.
Percussion Woodwind Brass Strings I know I'm missing two but I'll update my answer as soon as I can.
string
The xylophone is an instrument which belongs to the percussion instrument.
There are four (4) groups of instruments: Strings, Woodwinds, Brass and Percussion.
Woodwind, brass, strings, percussion.
The two types of percussion instruments are pitched percussion and unpitched percussio n; pictch percussion produces a note and an audiable pitch, whereas unpitched percussion merely produces a note.
To narrow it down to three groups, it would be strings, winds, and percussion.
woodwinds, percussion, and brass
They are brass, woodwinds, percussion, strings, and electronic.