If the letters of the word ASSASSINATION are arranged at random. Find the probability that (i)Four S's come consecutively in the word. (ii)Two I's and two N's come together. (iii)All A's are not coming together. (iv)No two A's are coming together.

Explanation

Given word: ASSASINATION


Total no. of letters in the word = 13


Viz., 3 A’s, 4 S’s, 2 I’s, 1 T & 1 O


No. of ways in which these letters can be arranged –


...