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 Jun 12, 2021
 #1
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First find the number of ways to pick 2 boxes out of 5 distinct boxes where order doesn't matter.   Call this number A.  Next, find the number of ways to seat 3 people in a circle where two seatings are considered the same if one seating can be rotated or flipped in 3D into another.   Call this number B.  The answer is AB.

 Jun 12, 2021
 #2
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thanks!

 Jun 12, 2021
 #3
avatar+287 
0

Come to think of it, flipping should not be allowed.   Sorry.

Bginner  Jun 12, 2021

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