3a catch-and-release fisherman catches a fish and then releases the fish back into the river
so as not to harm the fish.
at a local river, 50% of the fish are white sturgeon, 35% are brook trout, and 15% are
chinook salmon.
if a fisherman catches and releases a fish and then catches and releases a second fish,
then what is the probability that both fish he caught were white sturgeon? enter your
answer as a decimal rounded to the nearest hundredth.