If Q and T are among the birds assigned to the cages, which one of the following is a pair of birds that must be exhi...

Mimi13 September 22, 2021

How is R chosen instead of S?

Hi I am just confused on why the correct pairing is R with W? How does W mean S is out? Thank you so much :)

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Mimi13 September 22, 2021

Just found the answer in this discussion actually, thank you