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
คำอธิบาย
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.