10 Fish in a Tank Riddle Answer

Fish do not drown or swim away when they are in a tank, and this scenario is also not possible within a closed tank. Therefore, only the fish that die should be considered.

Out of the 10 fish, 3 die. Therefore, the remaining fish are:

$10-3=710\; –\; 3\; =\; 7$

So, there are 7 fish left in the tank.