A lemonade stand sold only small and large cups of lemonade on Tuesday. 4/5 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? Choose the correct choice from the following answers
A) (a) 7/16  B) (b) 7/15  C) (c) 10/21  D) (d) 7/31  E) (e) 1/2
A simpler way i guess would be to think that in total 5 cups were sold. Out of which 4 are small and 1 is large. Now let the small ones cost $6. so the large ones would cost $7.   So,   4*6= 
<gadget id="calculator">4*6</gadget>
<output>24</output>
24 and   1*7= 
<gadget id="calculator">  1*7</gadget>
<output>7</output>
7.   Total revenue was 24+7= 
<gadget id="calculator">24+7</gadget>
<output>31</output>
31   and Large cup sales as found above is 7   Therefore answer is 7/31   (d) 7/31
<result>D</result>
A lemonade stand sold only small and large cups of lemonade on Tuesday. 4/5 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?