Answer:
773 salmons
Explanation:
Total number of salmon caught by fishermen = 60
Total number of tagged salmon caught = 20
Percentage of tagged salmon in the sample = 20/60 x 100 = 33.33%
255 tagged salmon constitutes 33.33% of the entire salmon population
If the entire population is represented by X
255 = 33/100 of X
X = 255 x 100/33
X = 772.7
Hence, the salmon population in the lake is approximately 773.