A dectet (or a band or an orchestra)
The group of people in the church are called a congregation.
10 years is a decade.
People at a concert are called several things:crowdaudienceconcertgoersfans
It is called a quintet
Such is called a decade.
A group of ten or more kangaroos is called Mob, Troop or Court .
A group of ten or more kangaroos is called Mob, Troop or Court .
ten men
decemvir
A group of ten musicians is called a dectet also known as decet.
A group with nine people is called a nonet.
A group of people is called a crowd
a group or team of intelligent people are called wath
It's called a group.
A group of people is often called a "crowd" or a "gathering."
The group of people in the church are called a congregation.