SOLUTION: In how many ways can 12 different amino acids be arranged into a polypeptide chain of five amino acids

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Question 1092054: In how many ways can 12 different amino acids be arranged into a polypeptide chain of five amino acids
Answer by ikleyn(52884) About Me  (Show Source):
You can put this solution on YOUR website!
.
In 12*11*10*9*8 = 95040 ways.


Anyone of 12           amino acid in the 1-st position;
Anyone of 11 remaining amino acid in the 2-nd position;
Anyone of 10 remaining amino acid in the 3-rd position;
Anyone of  9 remaining amino acid in the 4-th position;
Anyone of  8 remaining amino acid in the 5-nd position.


In all, you get this quantity,  12P%5B5%5D = 12*11*10*9*8 = 95040 ways.

Under the assumption that this logic really works in this situation.