Question on: JAMB Mathematics - 2009
in how many ways can 9 people be seated if 3 chairs 3 chairs are available
A
720
B
504
C
336
D
210
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Correct Option: B
(\frac{n!}{n - r!}) = (\frac{9!}{9 - 3!})
= (\frac{9!}{6!})
= 9 x 8 x 7
= 502
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