A 5-letter code word consists of letters A, B, C and D. If the code includes all the gour letters, how many such codes are possible?	Choose the correct choice from the following answers: A) 72 B) 48 C) 36 D) 240 E) 18
A-ABCD can be arranged in 5!/2!=60 ways;   B-ABCD can be arranged in 5!/2!=60 ways;   C-ABCD can be arranged in 5!/2!=60 ways;   D-ABCD can be arranged in 5!/2!=60 ways;   Total:  60+60+60+60= 
<gadget id="calculator"> 60+60+60+60</gadget>
<output>240</output>
240.   Answer: 240.
<result>D</result>
A 5-letter code word consists of letters A, B, C and D. If the code includes all the gour letters, how many such codes are possible?