怎么做这个
L = [75, 92, 59, 68, 99]
sum =0
for s in L:
sum=sum+s
abv=sum/5
print(abv);
L = [75, 92, 59, 68, 99]
sum = 0
num = 0
for i in L:
sum+=i
num+=1
print(round(sum/(float(num)),2))
s1='ABC'
s2='123'
s3='xyz'
for a in s1:
for b in s2:
for c in s3:
print(a+b+c)