Friday, 8 November 2013

Tree Diagrams

1.       A hat contains 8 purple and 2 green discs. Two discs are selected, without replacement, from the hat.


(a)    Draw a tree diagram to represent this situation.









(b)    Determine the probability that

(i) they are both green





(ii) the first is purple and the second is green






(iii) they are identical in colour


  1. I almost got it Mr Troy.

  2. Mr.Troy can I do it on paper and bring it in to show you.