Mathematics for IGCSE & O level - Probability (Section 4 - No. 36)

A bag contains 4 red marbles and 6 blue marbles. Which events are *independent* if you draw two marbles with replacement?

Drawing a red marble on the first draw

Drawing a blue marble on the second draw

Drawing a red marble on the second draw

Drawing a green marble on the first draw

Since there is replacement after the first draw, drawing a red or blue on the second draw is not dependent on the outcome of the first draw.