A trio.
82
91
Typically a string quartet is two violins, one viola, one cello.
There are 15 possibilities. In psuedo-code, the math works out like this: n = 42-1 where n is the number of possibilities, 4 is the size of a quartette, 2 is the number of different types of singers, and -1 reflects that a quartet of all non-sopranos does not meet your criteria.
There are many places where one can find information about the barbershop quartet. These places include, but are not limited to, Wikipedia and their official webpage.
A group of four musicians or singers are called a quartet. A group of five musicians or singers are called a quintet.
A quartet. Typically would have one soprano (highest vocal range), one alto (second highest), one tenor (second lowest), and one bass (lowest).
Typically a string quartet is two violins, one viola, one cello.
It's called a Quartet. :D
1 minus 1/2 minus 1/3 is equal to 0.166667
mindless behavior which they is a quartet
Quartet or Foursome.