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Britney keeps track of the populations of various creatures near a lake. In order to estimate the dragonfly population, she captures $1,400$ dragonflies and marks them with special paint. She releases them, waits a few days, and then captures $620$ dragonflies. She notices that $62$ of these dragonflies are marked. To the nearest whole number, what is the best estimate for the dragonfly population?

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Estimate population size using proportions

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Q. Britney keeps track of the populations of various creatures near a lake. In order to estimate the dragonfly population, she captures

1,400

dragonflies and marks them with special paint. She releases them, waits a few days, and then captures

620

dragonflies. She notices that

62

of these dragonflies are marked. To the nearest whole number, what is the best estimate for the dragonfly population?

Set up proportion: Step $1$ : Set up the proportion based on the capture-recapture method.
Solve for $D$ : Step $2$ : Solve the proportion by cross-multiplying to find $D$ .
Calculate estimated population: Step $3$ : Calculate the estimated population.

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