Question

Some students,during a study,caught,marked and released 80 fishes in a pondLater 100 fishes were caught at randomAmong these 40 were found to be markedWhat is the approximate numberof fishes in the pond? (1)50 (2)100 (3)200 (4)4000

Answer 1

Answer:

200

Explanation:

Answer 2

Answer:

option 3) 200

Explanation:

Let's take the total number of fishes in the pond be x.

When 80 fishes are marked, then the ratio of tagged fishes to total fishes is 80/x

When 100 fishes were caught out of which 40 were marked, then the ratio of tagged fishes to total fishes is 40/100

Taking the distribution of fishes in the pond to be uniform, the ratio of tagged fishes to the total fishes will be same in both the situations.

Hence, the equation can be shown as:

80/x = 40/100

This comes out to be 200

So, the correct answer is '200'.