Question

Multiple-choice questions have a special grading rule determined by your instructor. Assume that your instructor has decided to grade these questions in the following way: If you submit an incorrect answer to a multiple-choice question with nnn options, you will lose 1/(n−1)1/(n−1) of the credit for that question. Just like the similar multiple-choice penalty on most standardized tests, this rule is necessary to prevent random guessing.If a multiple-choice question has five answer choices and you submit one wrong answer before getting the question correct, how much credit will you lose for that part of the question?
a. 100%
b. 50%
c. 33%
d. 25%
e. 20%

Answer 1

Answer:

The correct answer is option d.

Explanation:

On submission of an incorrect answer to a multiple-choice question with n options,  we will lose:

$=\frac{ 1}{(n-1)}$ of credit

If we multiple-choice question has five answer choices. And we have submitted 1 wrong answer. the fraction of credit we loose :

$=\frac{ 1}{(5-1)}$ of credit

$=\frac{1}{4}$ of credit

$=0.25$ credit

The percentage of credit we loose:

$=0.25\times 100$ of credits

$=25\%$ of credits