The number of possible different 12-letter arrangements of the letters in the word “TRIGONOMETRY” is represented by

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12-06-2016
Mathematics

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The number of possible different 12-letter arrangements of the letters in the word “TRIGONOMETRY” is represented by

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HomertheGenius HomertheGenius · Answer 1 · 2016-06-24T22:44:48+02:00

HomertheGenius HomertheGenius

24-06-2016

We will use formula for Permutations with repetition:
P(n, m1,m2,m3) = n! / m1! · m2! · m3!
In the word TRIGONOMETRY we have repetitions of letters: T, R and O.
P=[tex] \frac{12!}{2!*2!*2!}= \frac{12*11*10*9*8*7*6*5*4*3*2*1}{2*1*2*1*2*1} = [/tex] = 59,875,200

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