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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
 one year ago
 one year ago
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
 one year ago
 one year ago

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CliffSedgeBest ResponseYou've already chosen the best response.0
8c3 if order doesn't matter.
 one year ago

CliffSedgeBest ResponseYou've already chosen the best response.0
Are you familiar with Pascal's Triange?
 one year ago

A.Avinash_GouthamBest ResponseYou've already chosen the best response.0
u kno wat 8p3 is?
 one year ago

CliffSedgeBest ResponseYou've already chosen the best response.0
I'm pretty sure this is a combination and not a permutation.
 one year ago

A.Avinash_GouthamBest ResponseYou've already chosen the best response.0
yup that's a combination nd it's 8c3
 one year ago

CliffSedgeBest 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.
 one year ago

CliffSedgeBest 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.
 one year ago

WolfboyBest 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.
 one year ago

CliffSedgeBest 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.
 one year ago

CliffSedgeBest ResponseYou've already chosen the best response.0
Do you know how to write out a factorial?
 one year ago

WolfboyBest ResponseYou've already chosen the best response.0
uh i probably do but dont remember can you show me again?
 one year ago

CliffSedgeBest 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.
 one year ago

CliffSedgeBest 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
 one year ago

WolfboyBest ResponseYou've already chosen the best response.0
Thanks for all of your help @CliffSedge
 one year ago
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