How many different three-digit integers can be composed of digits 1, 2, and 3 ?
Choose the correct choice from the following choices
A) 27  B) 54  C) 64  D) 72  E) 81
The possible number of variant =3*3*3= 
<gadget id="calculator">3*3*3</gadget>
<output>27</output>
27   Option 27
<result>A</result>
How many different three-digit integers can be composed of digits 1, 2, and 3 ?