What is the domain of the function represented by these ordered pairs?
(2,5), (3,5), (4,7), (10,7)
a) {3, 5, 10)
b) {2, 3, 4, 5, 7, 10)
c) {5, 7}
d) {2, 3, 4, 10)

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?