Calculate Ronald's average score in an exam if he obtained the following marks 51, 57, 68, 60 and 78 out of 100 in different subjects.	Choices:
A) 69.8  B) 67.8  C) 62.8  D) 61.8  E) 60.8
Explanation:   (51+57+68+60+78)/5= 
<gadget id="calculator">(51+57+68+60+78)/5</gadget>
<output>314/5 = around 62.8</output>
62.8   Answer: Option 62.8
<result>C</result>
Calculate Ronald's average score in an exam if he obtained the following marks 51, 57, 68, 60 and 78 out of 100 in different subjects.