Respuesta :
we have given that 30 students .
we need to choose committee of 4 students .
so the formula used here [tex] nCr_{} [/tex].
where n is the total number of students.
and r is the student chosen from total.
so the possibility of choosing a commitee of 4 from 30 is
[tex] nCr=30C4=\frac{30*29*28*27}{1*2*3*4} =27405 [/tex].
so there 27405 possibilities can exist.