mat = 3
pol = 4
ang = 5
niem = 3
his = 3
biol = 4
che = 5
inf = 6
pp = 4
wos = 4
geo = 4
fiz = 3
print((mat + pol + ang + niem + his + biol + che + inf + pp + wos + geo + fiz) / 12)
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