At a certain diner, Joe ordered 3 doughnuts and a cup of coffee and was charged $ 2.25. Stella ordered 2 doughnuts and a cup of coffee and was charged $ 1.35. What is the price of 2 doughnuts? Choose the correct choice from the following choices:
A) $ 0.55  B) $ 1.00  C) $ 1.10  D) $ 1.30  E) $ 1.80
3D + C = 2.25......(1)   2D + C = 1.35........(2)   (1) - (2) --&gt; D = 0.9 --&gt; 2D = 1.8   Answer: $ 1.80
<result>E</result>
At a certain diner, Joe ordered 3 doughnuts and a cup of coffee and was charged $ 2.25. Stella ordered 2 doughnuts and a cup of coffee and was charged $ 1.35. What is the price of 2 doughnuts?