Grade O=10 Points Grade E=9 Points Grade A=8 Points Grade B=7 Points Grade C=6 Points Grade D=5 Points Grade F=4 Points A Student had Science, History, Language, Math and Science Practical courses each of 4 hours credit and score D in Language, C in History, A in Science, E in Math and O in Science Practical. How much he scored in a 10 Point Scale?