Question

In how many ways can the letters of the word BUBBLE be arranged?

Answer 1

According to the above the # of changes of 6 letters COMMON out of which 2 O's and 2 M's are identical is 6!2!∗2!=1806!2!∗2!=180.

Hence there is 180 variation of word  BUBBLE. If one arrange it in a different way than one can find out different words and that is total 180 .