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GRE general question

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Intern
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Joined: 19 Oct 2014
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GRE general question [#permalink] New post 19 Oct 2014, 21:28
Hi all,

i have a question while preparing for GAT.
In an examination paper of 5 Questions, 5 percent of the candidates answered all of them and 5 percent none of the rest,25 percent answered only one question,20 percent only 4.if 24 1/2 percent of the entire candidates answered only two questions and 200 answered only 3 questions,how many candidates appeared in examination?
please help me in finding out
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Re: GRE general question [#permalink] New post 20 Oct 2014, 06:46
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Expert's post
Let there be 100x candidates who appeared for the exam.







Numver of CandidatesNumber Of questions
5x0
25x1
24.5x2
2003
20x4
5x5


So thats an exhaustive set, so we can write

5x+25x+24.5x+200+20x+5x = 100x

Therefore 20.5x = 200;
Now 100 x is the total number of candidates who appear in the exam. Easy to find, but the value is not coming to an integer. You sure you got all the values right?
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Re: GRE general question   [#permalink] 20 Oct 2014, 06:46
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