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Wolfboy
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Aysha has 8 pictures to hang over her couch. She wants to hang only 3 of them.
Find how many ways she can choose the 3 pictures from the 8
 2 years ago
 2 years ago
Wolfboy Group Title
Aysha has 8 pictures to hang over her couch. She wants to hang only 3 of them. Find how many ways she can choose the 3 pictures from the 8
 2 years ago
 2 years ago

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A.Avinash_Goutham Group TitleBest ResponseYou've already chosen the best response.0
8p3
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
8c3 if order doesn't matter.
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
Are you familiar with Pascal's Triange?
 2 years ago

Wolfboy Group TitleBest ResponseYou've already chosen the best response.0
uh not realy
 2 years ago

A.Avinash_Goutham Group TitleBest ResponseYou've already chosen the best response.0
u kno wat 8p3 is?
 2 years ago

Wolfboy Group TitleBest ResponseYou've already chosen the best response.0
not exactly
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
I'm pretty sure this is a combination and not a permutation.
 2 years ago

A.Avinash_Goutham Group TitleBest ResponseYou've already chosen the best response.0
yup that's a combination nd it's 8c3
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
Can use either Pascal's Triangle or the formula with factorials. For n=8, probably better off using the formula.
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
nCx = n!/(x!(nx)!) I think that's it. I'm just pulling it from memory, so I might have it mixed up with the other one, but it looks right.
 2 years ago

Wolfboy Group TitleBest ResponseYou've already chosen the best response.0
ok so how do we use this to make our equation. And sorry for the slowness i went surfing yesterday and i am still really tiered.
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
A quick drawing of Pascal's Triangle shows it's 56, and 8!(3!(83)!) = the same.
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
Do you know how to write out a factorial?
 2 years ago

Wolfboy Group TitleBest ResponseYou've already chosen the best response.0
uh i probably do but dont remember can you show me again?
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
While I do that, do an internet search for "Pascal's Triangle."  It's useful not only for combinations, but also for finding the coefficients of an expanded power of a binomial.
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
n! = n*(n1)*(n2)*...*1 e.g. 8! = 8*7*6*5*4*3*2*1 dividing factorials is easy because so many common factors cancel out. e.g. 8!/3! = 8*7*6*5*4
 2 years ago

Wolfboy Group TitleBest ResponseYou've already chosen the best response.0
Thanks for all of your help @CliffSedge
 2 years ago
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