Predict first. A white hatchling does worse in the swamp than a normal one. You walk the swamp and find one white alligator in every thousand. The number that hatched white, per thousand, is:
Set the swamp
white alligators you would find, per thousand:
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Find three different hatch rates that all leave about one white per thousand in the swamp.
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What hatched, and what you find
Both marks are rates per thousand, on a scale where each step is ten times the one before. The gap between them is whatever did the removing.
You matched the same swamp count three different ways. From the count alone — one white per thousand found — the number that hatched white is: