Hello I’m doing CIE A-Level Statistics. Can someon December 28, 2016 By Essaypros Hello I’m doing CIE A-Level Statistics. Can someone give me a detailed explanation for solving this question? Also can we use tree diagram to solve it? We Deliver Top Quality On Time As Promised! Ready to get started? Just click the button to be directed to a secure page so you can enter the details of your paper.