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OpenStudy (anonymous):
please help? picture attached..
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OpenStudy (anonymous):
OpenStudy (anonymous):
@ganeshie8 can you help me?:)
hartnn (hartnn):
use the formula \(\Large nPr = \dfrac{n!}{(n-r)!}\) here, n = 9 r=4 just plug in!
OpenStudy (anonymous):
|dw:1398189977650:dw| ok..now what?
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