Answer Happy

This question is not the same as online, please do not copy and paste other people's replies
A pond contains 50 fish. Two are caught, tagged, and released back into the pond. After the tagged fish have had a chance to mingle with the others, six fish are caught and released, one at a time. Assume that every fish in the pond is equally likely to be caught each time, regardless of which fish have been caught (and released) previously (this is not a realistic assumption for real fish in a real pond). The chance that among the fish caught in the second stage (after the tagging). at least zero and at most three were previously tagged is (Q1)