If out of a pond 60 fishes are taken out and tagged then left again in the pond and after some time 1000 fishes are taken out out of which 40 are already tagged find the total number of fishes in the pond?

• 60 taken out 40 taged
  1000 taken =1040
  
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• ans-1500
  1000 fish 40 tag
  500 f 20 tag
  1500 f 60 tag
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• 60 already tagged
  so 1000+20=1020
  
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• 60 - 40 = 20
  1000 + 20 = 1020 fishes
  
  **if out of 60 taken out at the very first time only 40 were tagged then total no. of fishes is 1000
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