The possibility is 1 out of 8. You get this from adding up all trout (24), and then you divide that by what you are looking for (6 brown, so 24/6=4). If you have anything that says he caught # times, or something like that, multiply it by the denominator. This altogether is shown as
24÷6= 4 so probability of 1 out of 4. times 2 because he caught 2 fish. so then that would be 1 out of 8. :)