Posted by mystery on .
How many ways can 3 students be chosen from a class of 16 to represent their class at a banquet?
a.3,360
b.1,680
c.1,120
d.560

math 
Damon,
C(3,16) = 16!/[13!(3!) ]
= 16*15*14/(3*2) = 16 *5*7 = 560