Problem:
Last summer of the birds living on Town Lake were geese, were swans, were herons, and were ducks. What percent of the birds that were not swans were geese?
Answer Choices:
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B.
C.
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E.
Solution:
Because of the birds were not swans and of the birds were geese, it follows that of the birds that were not swans were geese.
The problems on this page are the property of the MAA's American Mathematics Competitions