A lemonade stand sold only small and large cups of lemonade on Tuesday. 3/5 of the cups sold were small and the rest were large. If the large cups were sold for 5/6 as much as the small cups, what fraction of Tuesday's total revenue was from the sale of large cups?
Choose the correct choice
A) 7/16  B) 7/15  C) 10/21  D) 17/35  E) 5/14
Let the total # of cups be 10.   # of small cups sold 3/5*10= 
<gadget id="calculator">3/5*10</gadget>
<output>6</output>
6;   # of large cups sold  10-6= 
<gadget id="calculator"> 10-6</gadget>
<output>4</output>
4;   Let the price of small cup be $6, then the price of larges cup would be 5/6*6= 
<gadget id="calculator">5/6*6</gadget>
<output>5</output>
$5;   Revenue from small cups: 6*$6=$36;   Revenue from large cups cups: 4*$5  6* 6= 
<gadget id="calculator">  6* 6</gadget>
<output>36</output>
$36;   Revenue from large cups cups: 4*$5=$20;   Fraction of total revenue from large cups: 20/(36+20) 4* 5= 
<gadget id="calculator"> 4* 5</gadget>
<output>20</output>
$20;   Fraction of total revenue from large cups: 20/(36+20)=5/14.   Answer: 5/14
<result>E</result>
A lemonade stand sold only small and large cups of lemonade on Tuesday. 3/5 of the cups sold were small and the rest were large. If the large cups were sold for 5/6 as much as the small cups, what fraction of Tuesday's total revenue was from the sale of large cups?