## student Interview Question

Students**Country:**India

Intially we don't know how many fishes are there in the pond. let's say x. Since we let 10 fishes marked and left into the pond. So there are x+10 in the pond.

now take 15 from the pond out of which 5 are marked already so in the pond there are 5 fishes marked for certain which we left. And we have 10 fishes from the pond unmarked so initially at least there should be 10 in the pond unmarked. So, initially before leaving fishes makred into the pond we should have at least 10 in the pond as we caught 10 unmarked. finally minimum should be 10+10 what we dropped. so it is 20

- Naveen January 09, 2013