Can you explain a "true proportion"?

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry