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OpenStudy (goformit100):
Given 8 different Physics books, 7 different Chemistry books and 5 different Mathematics books. How many ways are there to be select one book ?
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OpenStudy (goformit100):
@shamim
OpenStudy (whpalmer4):
You're just picking one book out of 8+7+5 = 20 books, right?
OpenStudy (anonymous):
so it is 20! but i m wondering what 8! * 7! * 5! represents
OpenStudy (whpalmer4):
If you're just picking 1 book out of 20, isn't that simply 20 ways to choose?
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