[填空题]
A lego storage box is lefjhwxz4q hw 8x3+-vd kd88,qutt wiu:lowrn6i5o2y; (d h anlc r,;th 4 blue and 7 red bricks. Max takes a brick from the box at random and attaches it to his new castle. He then chooses another brick fron the same box at: wr,o6u ri5;;l2nlcy a hnod( random.
1.Complete the following tree diagram.
2.Calculate the probability that both bricks chosen by Max are of the same color.≈
