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OpenStudy (anonymous):
I have 10 friends but I can only invite 7 to the party. How many ways I can do this?
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OpenStudy (anonymous):
I think 10C7=120
Vocaloid (vocaloid):
yea
OpenStudy (anonymous):
are u sure
OpenStudy (anonymous):
10*9*8*7*6*5*4
Vocaloid (vocaloid):
yeah, I'm pretty sure 10C7 is right we have 10 people to choose from, and we want a party of 7 this is a combination problem since the order doesn't matter
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OpenStudy (anonymous):
Yeay
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