perms and combs (1 Viewer)

[enigma_1]

In how many ways can the letters of the word DECISIONS be arranged so that the N is somewhere to the right of the D?

Help much much appreciated

 

[braintic]

In how many ways can the letters of the word DECISIONS be arranged so that the N is somewhere to the right of the D?

Help much much appreciated

Number of arrangements is 9!/(2!2!)

The N is equally likely to be to the left of the D as it is to be to the right of it.

So the answer is half the previous answer.

 

[enigma_1]

Number of arrangements is 9!/(2!2!)

The N is equally likely to be to the left of the D as it is to be to the right of it.

So the answer is half the previous answer.

Thanks so very much!