The probability that a randomly selected sushi roll contains salmon and is labeled not spicy is given by

Where n(salmon and not spicy) is 4 (intersection of salmon and not spicy)
n(total) is the total number of sushi rolls

So, the probability that a randomly selected sushi roll contains salmon and is labeled not spicy is

Therefore, the probability that a randomly selected sushi roll contains salmon and is labeled not spicy is 4/15