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http://prntscr.com/mwm0w2

 Mar 12, 2019
 #1
avatar+233 
+1

The first question is b. The odds go towards the same person not being selected twice, and there's a 2/3 chance that's he's selected once. Those are the best odds.

 

The second is 27. I don't know the exact formula for this, but I just wrote out all the possible solutions.

 

Hope this helps!

 Mar 12, 2019

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