You can put this solution on YOUR website! How many ways can you seat 4 people in 10 different chairs
# of ways to pick 4 seats: 10C4
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# of ways to arrange the 4 people in the 4 seats: 4! = 24 ways
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# of ways to seat 4 in 10 = 210*24 = 5040
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Cheers,
Stan H.