Hello, Mauro!

Are youreallyhaving difficulty reasoning these out?

. . .A box contains 3 marbles: 1 red, 1 green and 1 blue.

Consider an experiment that consists of taking one marble from the box,

replacing it, and then drawing a second marble from the box.

(a) Describe the sample space.

. . .(b) Describe the sample space when the first marble is not replaced.