The table below shows the number of marbles of different colors in a bag: Marble Experiment Color of Number of Marbles Marbles Red 1 White 5 Black 10 Ursula draws a marble from the bag randomly without looking. She then draws another marble from the bag without replacing the first one. Which expression shows the probability of drawing black marbles in both the trials? . (18 ) + (is ) (18 ) . (18) . (+8 ) . ( is )