摘要: Read the following SAT test question and then click on a button to select your answer. Alice bought pens for dollars eac...
Read the following SAT test question and then click on a button to select your answer.
Alice bought 
pens for 
dollars each, and Ben bought 
pens for 
dollars each. Which of the following is the average price per pen, in dollars, for all the pens that Alice and Ben bought?
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