David bought 4 pens with the average cost of $2. If David also buys the fifth pen with the price of $ 3, what is the average (arithmetic mean) price of those 5 pens?  Choices
A) $2.2 B) $2 C) $3.2 D) $4 E) $5.2
4 pens -&gt; Total cost = 4 * Avg cost = 4*2= 
<gadget id="calculator">4*2</gadget>
<output>8</output>
8   Fifth pen cost= 3   Total cost for 5 pens= 8+3= 
<gadget id="calculator">8+3</gadget>
<output>11</output>
11   AM= 11/5= 
<gadget id="calculator">11/5</gadget>
<output>11/5 = around 2.2</output>
2.2   Hence $2
<result>B</result>
David bought 4 pens with the average cost of $2. If David also buys the fifth pen with the price of $ 3, what is the average (arithmetic mean) price of those 5 pens?