They are brass, woodwinds, percussion, strings, and electronic.
four
nothing
Idiophones and Membranophones
the oboe is used in about all categories of of musical groups...even in marching bands. and yes, oboes are in the orchestra, and band as well.
there are lots of instruments like: the JEGOG the GANGSA the KHETUK the GONG the KENDANG
four
The instrument that has 5 strings is a banjo.
nothing
Idiophones and Membranophones
The Hornbostel-Sachs method of instrument classification has 5 main categories, and more than 300 basic groups under those. http://en.wikipedia.org/wiki/Hornbostel-Sachs
Woodwind, brass, strings, percussion.
strings and nonstring instruments
what are the 5 groups of superantigens
Strings, winds, brass, percussion.
4 groups of 10 = 40. 40 /5 = 8 so the answer is 8 groups of 5.
there are 3 groups
4 groups of 5 is the same as saying (4 x 5), so 4 groups of 5 would be 20.