Pls Help! the question is down below

20 only answer if 100% sure most high school-aged teens are very active. a. true b. false

Whats the name of the vertical axis

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?