How many ways can the letters in the word COMMON be arranged?	Choose the correct answer.
A) 6 B) 30 C) 90 D) 120 E) 180
According to the above the # of permutations of 6 letters COMMON out of which 2 O's and 2 M's are identical is 6!2!∗2!=180   Answer: 180.
<result>E</result>
How many ways can the letters in the word COMMON be arranged?