On a ferry, there are 27 cars and 13 trucks. The cars have an average mass of 1100 kg and the trucks have an average mass of 3000 kg. What is the average mass of all 40 vehicles on the ferry?	Pick
A) 1515.5	B) 1616.5	C) 1717.5	D) 1818.5	E) 1919.5
The total mass of the vehicles is 27*1100+13*3000= 
<gadget id="calculator">27*1100+13*3000</gadget>
<output>68_700</output>
68700   The average mass is   68700/40= 
<gadget id="calculator">  68700/40</gadget>
<output>3_435/2 = around 1_717.5</output>
1717.5   The answer is 1717.5.
<result>C</result>
On a ferry, there are 27 cars and 13 trucks. The cars have an average mass of 1100 kg and the trucks have an average mass of 3000 kg. What is the average mass of all 40 vehicles on the ferry?