Average Word length code coach. Failed test case 5. Why failed? Explained for me?

Question

import math
text = input()
wordLength = text.count(' ') + 1
letterLength = len(text) - wordLength
print(math.ceil(letterLength / wordLength))

Answer 1

letterLength is not len(text) - wordLength because you have +1 in your wordLength calculation.

Answer 2

you should calculate each word length first, and then calculate the average

Answer 3

thanks, but very general answer

Answer 4

could you my code review, and then explain my fault?