Eighty students are asked to write a sentence and record the hand they used to write with. A teacher then determines whether each sentence is written neatly or not. The results are summarized in the table.

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?