a 2004 study conducted at utah lake using the capture and recapture method estimated the carp method population in the lake to be about 1.1 million over a period of 15 days, workers captured tagged and released 24,000 carp.In the recapture phase of the study
10,300 were recaptured Estimate how many of the the carp that were recaptured had tags. (source Brett Prettyman with Carp cooking, utah lake. Its time to eat Salt Lake Tribune
24,000 out of 1.1 million carp were captured and tagged
24,000 / 1,100,000 = 0.0218 or 2.18% of the carp were tagged (in the total population)
So, if 10,300 were recaptured, then 2.18% of them should have tags (in the sample)
about 10,300 x 0.0218 = 225 carp had tags
Remember, that the 2.18% is the AVERAGE percentage of carp that are tagged in a SAMPLE group, so at any given time the number of carp recaptured with tags will only be ABOUT 2.18% of the number recaptured....MORE OR LESS.