In the study notes it is mentioned that a good model will produce approx. the number of expected exceptions and an example of 95% VaR model is used over 250 days. The computation shows that it will produce approximately 5% * 250 days = 25 days exception. Is that a typo? Should it not be 12.5 days. A few lines below however, the correct computation of 12.5 days seems to be mentioned.