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Mathematics 8 Online
OpenStudy (anonymous):

How many different three letter "words" can be made from the word ORANGE if repetition of letters is not allowed? A. 18 B. 120 C. 216 D. 20

OpenStudy (anonymous):

this is a math question?

OpenStudy (shane_b):

Yea, it is actually. ORANGE has 6 letters....so the answer is \[\frac{6!}{3!}=120\]

OpenStudy (anonymous):

The first letter can be any one of the 6 letters of the words the second letter any one of the remaining 5, and the third any of the remaining 4 So the number is 6 * 5 * 4 = 120 Because the order of the letters is important, the question is essentially what is 6 permute 3 How many different permutations of 3 things can be taken from 6 things. The answer is 6! / 3! = 120

OpenStudy (shane_b):

Someone knows how to google!

OpenStudy (anonymous):

Well if it exists why not use it?

OpenStudy (anonymous):

Lol thanks guys!

OpenStudy (anonymous):

oh. I added the word "meaningful" to the question

OpenStudy (shane_b):

Good job :)

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