A box contains 4 red marbles, 3 green marbles and 2 blue marbles. One marble is removed from the box and then replaced. Another marble is drawn from the box. What is the probability that the first marble is blue and the second marble is green?

Which of the following are independent events? a) knowing that it is going to rain tomorrow, and bringing an umbrella to schoolb) knowing that you have to get up early tomorrow, and going to bed before 9 p.mc) knowing that it is going to rain tomorrow, and going to bed before 9 p.md) knowing that you have a test in school tomorrow, and studying thw night before