If a 3-number code is formed of the integers from 1 to 15 inclusively, and each of the numbers in the code is different, how many possible codes are there?
Answers.
A) 2400
B) 2510
C) 2620
D) 2730
E) 2840
15*14*13= 
<gadget id="calculator">15*14*13</gadget>
<output>2_730</output>
2730   The answer is 2730.
<result>D</result>
If a 3-number code is formed of the integers from 1 to 15 inclusively, and each of the numbers in the code is different, how many possible codes are there?