Quandaries and Queries 

joel there are 12 chocolate, sugar and cinnamon cookies. the probability of choosing a chocolate cookie is 1/3. the probability of choosing a sugar cookie is 1/4 what is the probability of choosing a cinnamon cookie Hi Joel, Onethird of the cookies are chocolate. Onethird of 12 is 4, and hence 4 of the cookies are chocolate. (If onethird of 12 is difficult for your child, take 12 pennies and arrange them in three equal size piles. Each pile will have 4 pennies so onethird of 12 is 4.) Similarly onequarter of the cookies are sugar cookies and onequarter of 12 is 3. Thus 4 + 3 = 7 of the twelve cookies are either chocolate of sugar leaving 12  7 = 5 cookies that are cinnamon cookies. Hence the probability of choosing a cinnamon cookie is ^{5}/_{12}. I hope this helps,Penny 

