David obtained 70, 60, 78, 60 and 65 marks (out of 100) in English, Mathematics,Physics, Chemistry and Biology What are his average marks ?  Choose the correct choice.
A) 75
B) 27.6
C) 66.6
D) 16.5
E) 11
Explanation:   Average = (70+ 60+ 78+ 60+ 65 )/ 5 = 333/5 = 66.6.   Answer:66.6
<result>C</result>
David obtained 70, 60, 78, 60 and 65 marks (out of 100) in English, Mathematics,Physics, Chemistry and Biology What are his average marks ?