a , b , c , d , e are the 5 electronic shops in the naza market , which have 20 , 30 , 60 , 80 and 50 t . v . sets with them respectively , then the average number of t . v . sets in each shop is
n0 = 5.0
n1 = 20.0
n2 = 30.0
n3 = 60.0
n4 = 80.0
n5 = 50.0
t0 = n3 + n4
t1 = n1 + n2
t2 = n5 + t1
t3 = t0 + t2
answer = t3 / n0
print(answer)