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YeetBoi786
27.07.2019 •
Mathematics
Atextbook search committee is considering 18 books for possible adoption. the committee has decided to select 4 of the 18 for further consideration. in how many ways can it do so?
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Ответ:
₁₈C₄ = 18! ÷ (4!(18-4)!
= 18! ÷ (4! (14!)) The 14! cancels out in the numerator/denominator
= 18 x 17 x 16 x 15 ÷ (4 x 3 x 2)
= 3,060
Ответ:
2 3 and 6 are the answers GG