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Anthony and Michael sit on the six-member

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seraphicgirl
 Post subject: Re: Anthony and Michael sit on the six-member
 Post Posted: Thu Jun 02, 2011 10:15 am 
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Students


Posts: 11
see
M will be on one of the 6 seats
if he is on seat no 1, A will either be on his sub committee or will not be (illustration 1 and 5)

if he is on seat no.2, A will either be on his sub comm or will not be (illustration 2 and 4)

if he is on seat no.3, A will either be on his sub comm or not.but when A is on his sub comm then it would already be like the one covered in illustration 1, so we leave one of these out.

hence 5 cases, out of which only in 2 will A be in the same sub com.
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jnelson0612
 Post subject: Re: Anthony and Michael sit on the six-member
 Post Posted: Tue Jun 07, 2011 12:31 pm 
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ManhattanGMAT Staff


Posts: 1857
Oh yes! DUH.

I think of it as:

1) Make two committees of three:
__ __ __
__ __ __

2) Place Anthony on one committee:

A __ __
__ __ __

3) There are now five empty places for Michael. Two of those are on Anthony's committee, thus the answer is 2/5.

It seems you were saying the same thing. Thanks!

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Jamie Nelson
ManhattanGMAT Instructor
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seraphicgirl
 Post subject: Re: Anthony and Michael sit on the six-member
 Post Posted: Thu Jun 09, 2011 3:21 pm 
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Students


Posts: 11
yes! :)
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jnelson0612
 Post subject: Re: Anthony and Michael sit on the six-member
 Post Posted: Thu Jun 23, 2011 9:01 pm 
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ManhattanGMAT Staff


Posts: 1857
:-)

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Jamie Nelson
ManhattanGMAT Instructor
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