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A sample of 50 parrots are captured, tagged and released. Some time later, a second
sample of 75 parrots are captured, of which 10 are found to have tags. Use these values
to estimate the parrot population in the area.

 Mar 25, 2021
 #1
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I really don't know but here is a guess.

 

75 parrots = 10 tags

times both by 5

375 parrots = 50 tags

 

375 parrots.   

It is likely to be wrong though.

 Mar 25, 2021
 #2
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+1

They caught 1/5 of the tagged parrots    and that amounts to 75 parrots

   5 * 75 = 375 parrots

 Mar 25, 2021

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