GRE Permutation Practice Question. Rearranging letters. Hard Question

Описание к видео GRE Permutation Practice Question. Rearranging letters. Hard Question

Video solution to a classic GRE permutation practice question testing the concept of rearranging letters of a word with an interesting constraint thrown in.

Question
In how many rearrangements of the letters of the word SCINTILLATING will no two 'I's appear together?
A. 11C3 * 13!
B. (10!)/(2! * 2! * 2!)
C. 11C3 * 3! * 10!
D. 11C3 * (10! / (2! * 2! * 2!))
E. 11!/(2! * 2! * 2!)

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