Question

The number of arrangements of the letters of the word saloon, if the two o's do not come together, is

Answer 1

Just take two o's together to make 1 grp now u have 4 letters and 1 grp now you can arrange them in 5! Ways now total cases are 6!/2! As o gets repetated so req. Ans is total cases - wrong cases hence 6!/2! - 5!