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**Title:** Capture - Recapture

**Description:**
In this lesson, students experience an application of proportion that scientists actually use to solve real-life problems. Students learn how to estimate the size of a total population by taking samples and using proportions. The ratio of tagged items to the number of items in a sample is the same as the ratio of tagged items to the total population.
**Standard(s): **

[MA2015] AL2 (9-12) 14: Derive the formula for the sum of a finite geometric series (when the common ratio is not 1), and use the formula to solve problems.* [A-SSE4]

**Subject:**Mathematics

**Title:**Capture - Recapture

**Description:**In this lesson, students experience an application of proportion that scientists actually use to solve real-life problems. Students learn how to estimate the size of a total population by taking samples and using proportions. The ratio of tagged items to the number of items in a sample is the same as the ratio of tagged items to the total population.

**Thinkfinity Partner:**Illuminations

**Grade Span:**6,7,8,9,10,11,12