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probability_Confusing

by gunjan1208 » Thu Nov 03, 2011 12:52 am
There are 7 people in a group . 4 ppl have 1 sister each and 3 ppl have 2 sisters each.
What is the prob of two ppl selected who are not sisters?

Please post the calculation steps.
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by shankar.ashwin » Thu Nov 03, 2011 1:11 am
Are you sure of the questions? I believe this is a MGMAT problem and its a 'sibling' and not sister. Your question does not make sense.
This is the question I am referring to. https://www.beatthegmat.com/mgmat-question-t90928.html
gunjan1208 wrote:There are 7 people in a group . 4 ppl have 1 sister each and 3 ppl have 2 sisters each.
What is the prob of two ppl selected who are not sisters?

Please post the calculation steps.
Last edited by shankar.ashwin on Thu Nov 03, 2011 1:50 am, edited 1 time in total.
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by gunjan1208 » Thu Nov 03, 2011 1:38 am
Thanks Shankar...May be I got it from wrong source.....But you solved my issue.
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