According to the meaning of the question, the number of people who failed the statistics twice is the same. Accordingly, the equation can be listed:
(40+X)*( 1-92%)= 40 *( 1-90%)
Simplification: (40+X)*8=40* 10
8X=80
X= 10
Answer: The number of people without statistics is 10.
I hope my answer can help you!