I think it’s b sorry if I’m not correct
Https://www.tiger-algebra.com/drill/(3x~2−5xy_2y~2)−(7x~2−3xy−3y~2)/
13 and 26 are the greatest common factors among the common factors of 13
There are a total of 10 fishermen as stated in the given. The probability that a chosen fisherman liked salmon is 3/10. Also, the probability that a fisherman liked bass is 2/10. By using the conjunction "or" we add the probabilities of these events to arrive with the answer giving us 5/10 or 1/2. The answer is letter D.