A final exam has 40 multiple choice questions. Each question has 5 possible answers, one of which is correct. A correct answer is worth 4 points, but a point is taken off for each incorrect answer. The professor claims the final exam is hard, and any student gets 20 points or higher will pass the exam. A student answers all the questions by guessing at random. How likely will he pass the final exam? The chance is   a.   Between 3% to 4%.   b.   Bigger than 4%.   c.   Between 1% to 2%.   d.   Less than 1%.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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A final exam has 40 multiple choice questions. Each question has 5 possible answers, one of which is correct. A correct answer is worth 4 points, but a point is taken off for each incorrect answer. The professor claims the final exam is hard, and any student gets 20 points or higher will pass the exam.

A student answers all the questions by guessing at random. How likely will he pass the final exam?

The chance is

 

a.

 

Between 3% to 4%.

 

b.

 

Bigger than 4%.

 

c.

 

Between 1% to 2%.

 

d.

 

Less than 1%.

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