Steve Dobbs & Julian Gilbey 
Cambridge International AS and A Level Mathematics: Statistics 1 Revised Edition Digital edition 

This Digital edition coursebook has been revised and updated to ensure that it meets the requirements for the Statistics (S1) unit of Cambridge AS and A Level Mathematics (9709). This revised edition has been redesigned and adds clarifications on permutations and combinations and additional material on probability. All of the review questions have been updated to reflect changes in the style of questions asked in the course.