Adeck of 108 cards contain an equal number of each color: red, yello , green , and black. if a card is choosen at random, what is the probability that it is black ?

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters