Question

how many ways can a group of three students be chosen from a class of 30?

Answer 1

since you know the answer of ur previous question..
try in the same way..

Answer 2

you need to select 3 from 30

Answer 3

so its C(30,3) =30*29*28/3*2*1

Answer 4

i meant

=30*29*28/(3*2*1)