Question

write the number of arrangements of letters of words banana in which two n come together​

Answer 1

Answer:

Total number of permutations will be 3!2!6! due to repetitions of A and N.

Now taking two of the N's together, 

NN B A A A        ......    by taking NN as one block

we get

3!5! due to repetitions of 3A′s.

Hence, the required permutation will be

3!2!6!−3!5!

=60−20

=40

Answered By

sai sahana