任务的答案能提供下吗
#!/usr/bin/env python
s=[75,92,59,68,99]
a=0
n=0
for a in s:
a=a+a
n=n+1
print (a/n)
L = [75, 92, 59, 68, 99]
sum = 0.0
for x in L:
sum = sum + x
print(sum/5)