A lucky draw box contains 30 white balls, 12 green balls and 8 silver balls. A ball is randomly taken from the box to ch
Posted: Sun Jul 10, 2022 10:10 am
A lucky draw box contains 30 white balls, 12 green balls and 8 silver balls. A ball is randomly taken from the box to check whether it is green or not. It is then put back to the box. A second ball is taken and checked again whether it is green or not. (a) Use a tree diagram with probability labelled on each branch to show the probabilities of getting green balls in the two lucky draws. (b) Find the probabilities of getting (i) both balls are green; (ii) one of the balls is green; (iii) at least one ball is green