You catch, tag, and release 35 fish back into a pond. then, you catch 70 more fish, 12 of which have tags on them. what is the best estimate of the number of fish in the pond? a. 100 b. 150 c. 142 d. 204

The answer is D. 204. here is how:

Equation:

tagged fish caught/total fish caught = tagged fish in pond/total fish in pond (x) estimated

12/70 = 35/x

12/70x = 35

12x = 35 ⋅ 70

12x = 2,450

x ≈ 204.167

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