Rahim bought 4 pillows with the average cost of $5. If Rahim also buys the fifth pillow with the price of $ 10, what is the average (arithmetic mean) price of those 5 pillows?
Options:
A) $6  B) $5  C) $5.5  D) $6.5  E) $7
4 pillowss -&gt; Total cost = 4 * $6vg cost = 4*5= 
<gadget id="calculator">4*5</gadget>
<output>20</output>
20   Fifth pillow cost= 10   Total cost for 5 pillows = 20+10= 
<gadget id="calculator">20+10</gadget>
<output>30</output>
30   $6M= 30/5= 
<gadget id="calculator">30/5</gadget>
<output>6</output>
6   Hence $6
<result>A</result>
Rahim bought 4 pillows with the average cost of $5. If Rahim also buys the fifth pillow with the price of $ 10, what is the average (arithmetic mean) price of those 5 pillows?