Tonya has opened a lemonade stand selling lemonade in small, medium, and large cups at $1, $2 and $3 respectively. At the close of business she ended up making $50. As she went back through her inventory she noticed that she sold $11 worth of small lemonades and $24 worth of medium lemonades. How many cups of large lemonade did Tonya sell?
Let's be accurate as possible and think first.
5
1.

Tonya sold $11 worth of small lemonades and $24 worth of medium lemonades which makes $11 + $24 = $35 for small and medium lemonades.

2.

Tonya made a total of $50.

If she made $35 selling the two smaller sizes and she sold three sizes in all then $50 - $35 = $15 worth of large lemonades.

3.

The large lemonades sold for $3 each and Tonya sold $15 worth of large lemonades which means she sold $15 / $3 = 5 large cups of lemonade.

.

Final answer: 5