How many four letter words are formed using the letters of the word COMPUTER? Choose the most appropriate option
A) 1680	B) 1789	C) 1678	D) 1899	E) 1788
The number of letters in the given word is four.   The number of three letter words that can be formed using these four letters is 8P4   = 8 * 7 * 6 * 5= 
<gadget id="calculator">8 * 7 * 6 * 5</gadget>
<output>1_680</output>
1680.   1680nswer: 1680
<result>A</result>
How many four letter words are formed using the letters of the word COMPUTER?