Question
Let's say: A six-sided die is tossed 12 times. How many distinct sequences of faces (numbers from the set {1,2.3.4.5.6}) have number appearing exactly twice?
Let's say: A six-sided die is tossed 12 times. How many distinct sequences of faces (numbers from the set {1,2.3.4.5.6}) have number appearing exactly twice?
In the book, the answer is: 12!/ 26 = 7,484,400.
My question is: why do we use 12! to be divided by 26?? Why is not multiply?
Thank you
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Number Theory A Historical Approach
Authors: John J Watkins
1st Edition
1400848741, 9781400848744
