How i solve this problem of class 10th ncert of probability chapter of question no.9 give me the best and simple way for solving this problem in easy and the simple way this is an important question for class 10th A box contains 5 red marbles, 8 white marbles and 4 green marbles. One marble is taken out of the box at random. What is the probability that the marble taken out will be (i) red? (ii) white? (iii) not green?