WE ARE NOT AFRAID TO DIE, IF WE CAN ALL BE TOGETHER

WE\'RE NOT AFRAID TO DIE.. IF WE CAN ALL BE TOGETHER DETAILED EXPLANATION

The number of ways in which we can distribute 12 books to A, B, C such that A and B together get twice as many as C is

If all the letters of the word ARRANGE are arranged in all possible ways,in how many of words we will have the A's not together and also the R's not together?