A lemonade stand sold only small and large cups of lemonade on Tuesday. 2/5 of the cups sold were small and the rest were large. If the large cups were sold for 7/6 as much as the small cups, what fraction of Tuesday's total revenue was from the sale of large cups? Pick.
A) 7/11  B) 7/15  C) 10/21  D) 17/35  E) 1/2
Let the total # of cups be 10.   # of small cups sold 2/5*10= 
<gadget id="calculator">2/5*10</gadget>
<output>4</output>
4;   # of large cups sold  10-4= 
<gadget id="calculator"> 10-4</gadget>
<output>6</output>
6;   Let the price of small cup be $6, then the price of larges cup would be 7/6*6= 
<gadget id="calculator">7/6*6</gadget>
<output>7</output>
$7;   Revenue from small cups: 4*$6=$24;   Revenue from large cups cups: 6*$7  4* 6= 
<gadget id="calculator">  4* 6</gadget>
<output>24</output>
$24;   Revenue from large cups cups: 6*$7=$42;   Fraction of total revenue from large cups: 42/(42+24) 6* 7= 
<gadget id="calculator"> 6* 7</gadget>
<output>42</output>
$42;   Fraction of total revenue from large cups: 42/(42+24)=7/11.   7/11   7/11nswer: 7/11.
<result>A</result>
A lemonade stand sold only small and large cups of lemonade on Tuesday. 2/5 of the cups sold were small and the rest were large. If the large cups were sold for 7/6 as much as the small cups, what fraction of Tuesday's total revenue was from the sale of large cups?