In this question, we are asked how many days are there in month X.
Statement I tells us that the month before X has 31 days, but this does not provide any information about the number of days in month X itself.
Statement II tells us that the month after X has 31 days, but again, this does not provide any specific information about month X.
To determine the number of days in month X, we would need direct information about month X itself (e.g., whether it is February, a 30-day month, or a 31-day month). Therefore, neither statement alone nor both statements together provide sufficient information.
Conclusion: Therefore, neither statement alone nor both statements together provide sufficient information.