math
posted by mystery .
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

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