Question 750299
(285 tagged seals)/(1100 observed seals) found after the tagged ones during the tagging operation were mixed into the rest of the untagged seals.


Before the tagged seals were put into the collection of untagged seals,
(5758 tagged seals)/(U total seals)
U is the population of seals.


Proportion arranged conveniently: {{{U/5758=1100/285}}}  
U=22200 to the best of possible accuracy.