Question

An entrance examination has 200 questions in total. Every correct answer gives 1 mark with a negative mark of 1/4 for each incorrect answer. What is the opportunity cost of 30 incorrect questions.

A.7.5

B.30

C.37.5

D.can't be determined

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Answer 1

d. can't be determined is answer not sure

Answer 2

Given :  An entrance examination has 200 questions in total.

Each correct answer gives 1 mark

negative mark of 1/4 for each incorrect answer.

To Find :  the opportunity cost of 30 incorrect questions

A.7.5

B.30

C.37.5

D. can't be determined

Solution:

30 incorrect questions

One incorrect Question  = -1/4

=> 30  incorrect Questions  = 30 * ( -1/4)  = -7.5

Best could have been all 30 answers are correct

Hence Marks would have been = 30 (1) = 30  

Opportunity cost =  Best possible - Actual

= 30 - (-7.5)

= 37.5

opportunity cost of 30 incorrect questions is 37.5

Correct option id C) 37.5

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opportunity cost of 30 incorrect questions?

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