# BIO HELP?!?!?!?!?

119 turtles were captured and tagged in Australia. One year later, 75 were recaptured and 21 of them had tags. What is the estimated population size? Round to the nearest whole number and include a one word unit in your answer. *

### 2 Answers

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- MichaelLv 74 months agoFavourite answer
portion of population that has tags

21/75 = 0.28

Therefor

0.28x = 119

x = 119/.28

x = 425

425 turtles <––––––

- hayharbrLv 74 months ago
The proportion in the small sample should approximate the proportion of the whole population. So, if x = the estimated population size,

21/75 = 119/x. Cross multiply

21x = 119 • 75 = 8925

so divide 8925 by 21

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