Will You Pass?

Have You ever wondered whether it is better to have more or less questions on a test? The answer is: it depends. Using this app, You can check the probability of passing an exam based on: how well You know the subject, how much You need to pass and how many questions there are.

WARNING: THIS APP IS IN FACT USELESS I've written it here so that You don't have to write it in the comments

This app counts mathematical chances of passing an exam. "How well You know the subject" - these are the chances of answering a random question right.
The number after % needed to pass is the number of questions that have to be answered right to get not less than the required % - this might be a little bit higher than the required % (for example: you have 10 questions and you need to get 55% - that means you have to answer 6 questions right and get 60% - because 5 (50%) wouldn't be enough).