A bakery opened yesterday with its daily supply of 80 dozen rolls. Half of the rolls were sold by noon, and 80 percent of the remaining rolls were sold between noon and closing time. How many dozen rolls had not been sold when the bakery closed yesterday?
Choose the correct answer:
A) 8
B) 6
C) 5
D) 4
E) 3
answer is A ...8 dozens ....   half sold by noon --&gt; 40 dozens (40 *12 =480)   remaining --&gt; 40 dozens i.e 480 eggs...   80% sold --&gt; 80*480/100 =384 eggs   remaining 20% --&gt; 96 eggs (8 dozens ) --&gt; answer --  80*480/100= 
<gadget id="calculator"> --  80*480/100</gadget>
<output>384</output>
384 eggs   remaining 20% --&gt; 96 eggs (8 dozens ) --&gt; answer
<result>A</result>
A bakery opened yesterday with its daily supply of 80 dozen rolls. Half of the rolls were sold by noon, and 80 percent of the remaining rolls were sold between noon and closing time. How many dozen rolls had not been sold when the bakery closed yesterday?