Math Matters: Chance and average. 

 - Danbury, Ct :  Grolier Educational,  1999. 
 - 48p 
 - Math Matters .
<br/><br/><label>ISBN: </label>0-7172-9294-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MAthematics<br/>Arithmetic<br/>Average