qveenvslayin
30.08.2019 •
Mathematics
Biologists want to know how many fish are in a certain lake. on january 1, they removed 600 fish from the lake and tagged them. on february 1, they returned to the lake and collected a random sample of 250 fish, of which 15 had been previously tagged. approximately how many fish does the lake have, based on this experiment?
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Ответ:
tagged:all=?:600
then we will assume a proportional sample
out of 250, 15 were tagged
so
250:15=?:600
250/15=?/600
50/3=?/600
times both sides by 600
30000/3=?
10000=?
10000 fish
Ответ:
this is your answer. if I am right so
please mark me as a brainliest. thanks!!