Question 253801
Carol wants to arrange 3 of her 4 plants in a row on the shelf. If each of the plants is in a different- colored container, how many different arrangements can she make ?
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4P3 = 4!/(4-3)! = 4!/1! = 4*3*2*1 = 12
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Cheers,
Stan H. 
(A) 7 (B) 12 (C) 24 (D) 28 (E) 36