Question 603938
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Hi,
Let x represent the total number of deers in the forrest

he caught 228 deers, tagged them and release them. then he caught 89 deers, 
85 of those were tagged. 

 {{{228/x = 85/89}}}  | Cross Multiplying to solve
  85x = 89·228
    x = 89·228 / 85