AP EAMCET Engineering 22 Sep 2020 Shift 1 Paper

The number of all possible ways to arrange the letters of word ASSASSINATION is =‌

13!

3!4!2!2!

Now, the number of ways to arrange the letters S,S,S,S,1,N,T,I,O,N is ‌

10!

4!2!2!

and the three A 's we must arrange between the gaps or at the end positions and it can be done in ‌11C3.
So, requircd probability =‌

‌ 10! 4!2!2! ×‌11C3

13! 3!4!2!2!