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posted by mystery on Friday, January 31, 2014 at 5:42pm.
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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