The question comes as following
A failing student is passed by an examiner, it is an example of
(a)Type I error
(b) Type II error
(c) Unbiased decision
(d) Difficult to tell
A failing student is made to pass by an examiner, it is an example of Type-II error.
In statistical hypothesis testing.
A type I error (false-positive) occurs if an examiner rejects a null hypothesis that is actually true in the Statistical population
In a type II error (false-negative) occurs if the examiner fails to reject a null hypothesis that is actually false in the Statistical population.
So, For the question
When a failing student is passed by an examiner it is an example of What?
Answer is : Type II error