How many words of 3 letters can be formed from the letters "AABBCC"?	Choose the correct option
A) 18
B) 21
C) 24
D) 27
E) 29
There are 3 distinct letters: A, B, C   There are repetition: 2A, 2B, 2C   1. All 3 letters are different: 3!=6   2. Two letters are similar, third is different:   - choose 1 out of 3 letters: 3241   - choose 1 out of remaining 2 letters: 2241   - count in repetitions: 3!/2!   3241x2241x3!/2! = 18   Total:  18+6= 
<gadget id="calculator"> 18+6</gadget>
<output>24</output>
24 ANSWER:24
<result>C</result>
How many words of 3 letters can be formed from the letters "AABBCC"?