dacid obtained 90 , 92 , 85 , 87 and 85 marks ( out of 100 ) in english , mathematics , physics , chemistry and biology . what are his average marks ?
n0 = 90.0
n1 = 92.0
n2 = 85.0
n3 = 87.0
n4 = 85.0
n5 = 100.0
t0 = n0 + n1
t1 = 10.0 / 2.0
t2 = n2 + t0
t3 = n3 + t2
t4 = n4 + t3
answer = t4 / t1
print(answer)