How many questions correct signifies the top 1/2% of scores from a 100 question

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each with five answer choices

Oct 9th, 2015

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Use the binomial pdf 

The probability of correct answer= 1/5=.2

N= 100

We are looking for x where P(x)>=.995



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Oct 9th, 2015

x=31

Oct 9th, 2015

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