A 3-letters code consists of three different letters. If the code contains at least 2 vowels, how many such codes are possible?  Choose the correct choice from the following.
A) 480	B) 510	C) 520	D) 430	E) 540
5 Vowels   21 Consonants   Remember that the letters have to different.   480t least 2 = 2-Vowels + 3-Vowels   2-Vowels:   5*4*21= 
<gadget id="calculator">  5*4*21</gadget>
<output>420</output>
420   3-Vowels:   5*4*3= 
<gadget id="calculator">  5*4*3</gadget>
<output>60</output>
60   Total= 480   480NS:480
<result>A</result>
A 3-letters code consists of three different letters. If the code contains at least 2 vowels, how many such codes are possible?