-3
from random import uniform
def e(x):
n=len(x)
return(sum(x)/n)
def dmean(e,x,new):
n=len(x)
return((e*n+new)/(n+1))
l=[1,2,3,4,5,6,78]
e(l)
for i in range(0,5):
l.append(uniform(0,10))
e=e(l)
d=dmean(e,l,uniform(0,10))