Patrick, David <br/><br/>
Art of problem solving : introduction to counting and probability 

 - California  AOPS Incorporated  2005 
 - xii, 243p;  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Counting and probability -- problem solving<br/>Mathematics(counting and probability) -- problem solving<br/>Problem solving -- counting and probability<br/>Statistics