Exam Pass Probability Calculator

• One pass mark: the whole exam is scored together against a single pass mark.
• Equal sections: the exam splits into equal parts and every part must clear the pass mark separately.
• Custom sections: you list each section's size and known count yourself, one line per section.

The total number of questions on the exam. Every question you do not know for sure is answered with a guess.

Questions you would answer correctly without guessing. These count as certain points; the probability math runs over the rest.

How many equal parts the exam splits into; your known questions are divided as evenly as possible across them.

You pass only if every section clears the pass mark on its own.

One section per line as questions, known — its size, then how many of those you know cold.

Example: 20, 12 is a 20-question section where 12 answers are certain.

On unknown questions: how many wrong options you can typically cross out before guessing among the rest.

Ruling out 1 of 4 options lifts a guess from 25% to 33% — elimination is a big lever in the result.

Negative marking: points subtracted per wrong answer, while each correct answer earns 1 point. Leave at 0 for exams without penalties.

Example: a penalty of 0.25 means four wrong answers cancel one correct one.