Please help i'll mark brainliest if your answer is correct

If i have one apple and give you the apple, how many apples do i have?

What is the greater volume 72 quarts or 23 gallons

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?