A CLASS CONSISTS OF 14 BOYS AND 17 GIRLS. FOUR STUDENTS FROM THE CLASS ARE TO BE SELECTED TO TO ON A TRIP. HOW MANY POSSIBILITIES ARE THERE FOR THE 4

Question

STUDENTS TO GO ON THE TRIP

Answer 1

nCr = n! / r! (n - r)!

 

nCr = 31! / 4! (31 - 4)!

 

nCr = 31! / 4! (27)!

 

nCr = (31 x 30 x 29 x 28)/(4 x 3 x 2 x 1)

 

I bet you can solve this now!