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 9/8 as much as the small cups, what fraction of Tuesday's total revenue was from the sale of large cups? Pick
A) (a) 7/16	B) (b) 7/15	C) (c) 10/21	D) (d) 17/35	E) (e) 3/7
A simpler way i guess would be to think that in total 5 cups were sold. Out of which 3 are small and 2 are large. Now let the small ones cost $8. so the large ones would cost $9.   So,   3*8= 
<gadget id="calculator">3*8</gadget>
<output>24</output>
24 and   2*9= 
<gadget id="calculator">  2*9</gadget>
<output>18</output>
18.   Total revenue was 24+18= 
<gadget id="calculator">24+18</gadget>
<output>42</output>
42   and Large cup sales as found above is 18   Therefore answer is 18/42 i.e 3/7   (e) 3/7
<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 9/8 as much as the small cups, what fraction of Tuesday's total revenue was from the sale of large cups?