[ARCHIVED THREAD] - Math problem time!

Posted: 11/7/2007 7:24:28 AM EDT

Let A={a(subscript1) a(subscript2) a (subscript3) .....,a(subscript n) } be a set with n elements. If r is an integer with 0<

r<n, how many subsets of A with r elements are there? How many subsets of A are there altogether? Your answers should be in terms of the C(n,r)'s

Someone school me, I haven't had a math course in 7 years, and it was my weakpoint in highschool in the first place.

-Ben

Posted: 11/7/2007 7:28:58 AM EDT

[#1]

I'm sorry, but as opposed to many of the other math problems posed here, that one doesn't even pretend to sound interesting.

Posted: 11/7/2007 7:32:09 AM EDT

[#2]

your dealing w/ combinations right?

You have to have some numbers to work w/ I believe

I.e. C(9,3) = 84

Posted: 11/7/2007 7:32:48 AM EDT

[#3]

Five out of four people have problems understanding fractions.

Posted: 11/7/2007 8:54:49 AM EDT

[#4]

Excuse me Mr. Osborn, Can I be dismissed? My brain is full.

Posted: 11/7/2007 8:59:55 AM EDT

[#5]

Quoted:
You have to have some numbers to work w/ I believe

+1

when you come across a problem like this, try filling in some numbers and solving it. look for a pattern.

[ARCHIVED THREAD] - Math problem time!

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[ARCHIVED THREAD] - Math problem time!

[ARCHIVED THREAD] - Math problem time!