In a certain pond, 80 fish were caught, tagged, and returned to the pond. A few days later, 80 fish were caught again, of which 2 were found to have been tagged. If the percent of tagged fish in the second catch approximates the percent of tagged fish in the pond, what`s the approximate number of fish in the pond?	Options: A) 400 B) 625 C) 1250 D) 3200 E) 10 000
The percent of tagged fish in the second catch is 2/80*100= 
<gadget id="calculator">2/80*100</gadget>
<output>5/2 = around 2.5</output>
2.5%.   We are told that 2.5% approximates the percent of tagged fish in the pond. Since there are 80 tagged fish, then we have 0.025x= 80 --&gt; x = 3,200.   Answer: 3200.
<result>D</result>
In a certain pond, 80 fish were caught, tagged, and returned to the pond. A few days later, 80 fish were caught again, of which 2 were found to have been tagged. If the percent of tagged fish in the second catch approximates the percent of tagged fish in the pond, what`s the approximate number of fish in the pond?