Probability and Statistics

The chart below represents the number of marbles in a jar.
P(green) = 

What is the approximate difference in the interquartile ranges?

What is the probability of spinning an even number? 

A die is rolled once.  What is the probability of rolling an odd number? Your answer should be a fraction in simplest form.

What is the mean of the following set of numbers: 4, 8, 12, 16, 20?

If a bag contains 3 red marbles, 2 blue marbles, and 5 green marbles, what is the probability of picking a blue marble?

What is the median of the following set of numbers: 3, 7, 9, 6, and 12?

A jar contains 2 pink, 6 red, and 4 blue marbles. If you pick one marble without looking, what is the probability that the marble you pick will be red or blue?

Deion has two bags of marbles. In the bag labeled ‘A’, he has 3 green, 4 blue and 10 yellow marbles. In the bag labeled ‘B’, he has 13 green, 5 blue, and 12 yellow marbles. Deion wants the bag with the highest probability of selecting a blue marble. Which of the following statements is true?