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A dental licensure exam requires a 75% minimum score in orde [#permalink]

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18 Mar 2014, 16:07

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A

B

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D

E

Difficulty:

95% (hard)

Question Stats:

27% (02:29) correct
73% (01:49) wrong based on 321 sessions

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A dental licensure exam requires a 75% minimum score in order to pass each section. Did Jennifer pass the 30-question third section?

(1) Jennifer recorded 8 more correct answers on the second half of the third section than she did on the first half of the third section. (2) Jennifer answered one more question correctly on the third section than she did on the 28-question second section, which she passed.

Hi, can anyone explain how this question works, please. I am not fully convinced with the answer.

(1): Fact that if there are only 30 questions total, then there are only 15 questions per half section. That means the MOST she could get right on the second half is 15, and since the second half had 8 more right answers than the first, the most she could have gotten right on the first half is 7 for a total maximum of 22 questions correct. Since she needs 75% to pass, and 22/30 is less than 75% (75% is 3/4 which would be 22.5 out of 30), she cannot pass. Answer is "no” Sufficient

(2): Insufficient. If she passed the second section, that means she answered at least 21 questions correctly, meaning that she answered at least 22 correctly (one more than she did on section two) on section three. But since the magic number is 22.5 to have 75% correct, she may not have passed (22) or she may have passed (22 is the minimum, but she could theoretically have gotten as many as 29 right), Insufficient

Re: dental licensure exam requires a 75% minimum score in order [#permalink]

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18 Mar 2014, 18:58

I agree with the explanation for number (2) - maximum correct 28 questions, minimum correct 21 questions.

But I disagree with the explanation for (1). Is it true that whenever there an exam is split into two sections you would have an equal number of questions in each halves? Then again, if the examinee only answered one question correctly in the first half and and nine questions on the second half, he would not have passed the third section.

Re: dental licensure exam requires a 75% minimum score in order [#permalink]

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19 Mar 2014, 02:36

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pretzel wrote:

I agree with the explanation for number (2) - maximum correct 28 questions, minimum correct 21 questions.

But I disagree with the explanation for (1). Is it true that whenever there an exam is split into two sections you would have an equal number of questions in each halves? Then again, if the examinee only answered one question correctly in the first half and and nine questions on the second half, he would not have passed the third section.

We are told that Jennifer recorded 8 more correct answers on the second half of the third section than she did on the first half of the third section. So, she recorded 8 more correct answers on the first 15 questions, than she did on the second 15 questions.

A dental licensure exam requires a 75% minimum score in order to pass each section. Did Jennifer pass the 30-question third section?

For Jenifer to pass the section must answer at least 3/4*30 = 22.5, so at least 23 questions correct.

(1) Jennifer recorded 8 more correct answers on the second half of the third section than she did on the first half of the third section.

Even if Jenifer answered all 15 questions correctly on the second half and 15-8=7 questions correctly on the first half, she would only get 15+7=22 questions correctly, which is still less than minimum required (23). Thus, she did not pass the section. Sufficient.

(2) Jennifer answered one more question correctly on the third section than she did on the 28-question second section, which she passed.

For Jenifer to pass the second section must have answered at least 3/4*28=21 questions correctly there. Thus she answered at least 21+1=22 questions correctly on the third section, therefore she may or may not have passed the third section. Not sufficient.

Re: A dental licensure exam requires a 75% minimum score in orde [#permalink]

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18 Jun 2014, 19:56

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The condition for passing the test is based on 75% score, not the number of questions. Hence, the answer should ideally be 'E' unless it is mentioned that "each question carries equal weightage in the score.

A dental licensure exam requires a 75% minimum score in orde [#permalink]

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08 Oct 2014, 23:02

Bunuel,

How did you get "Thus she answered at least 21+1=22 questions correctly from "Jennifer answered one more question correctly on the third section than she did on the 28-question second section, which she passed"?

Bunuel wrote:

pretzel wrote:

I agree with the explanation for number (2) - maximum correct 28 questions, minimum correct 21 questions.

But I disagree with the explanation for (1). Is it true that whenever there an exam is split into two sections you would have an equal number of questions in each halves? Then again, if the examinee only answered one question correctly in the first half and and nine questions on the second half, he would not have passed the third section.

We are told that Jennifer recorded 8 more correct answers on the second half of the third section than she did on the first half of the third section. So, she recorded 8 more correct answers on the first 15 questions, than she did on the second 15 questions.

A dental licensure exam requires a 75% minimum score in order to pass each section. Did Jennifer pass the 30-question third section?

For Jenifer to pass the section must answer at least 3/4*30 = 22.5, so at least 23 questions correct.

(1) Jennifer recorded 8 more correct answers on the second half of the third section than she did on the first half of the third section.

Even if Jenifer answered all 15 questions correctly on the second half and 15-8=7 questions correctly on the first half, she would only get 15+7=22 questions correctly, which is still less than minimum required (23). Thus, she did not pass the section. Sufficient.

(2) Jennifer answered one more question correctly on the third section than she did on the 28-question second section, which she passed.

For Jenifer to pass the second section must have answered at least 3/4*28=21 questions correctly there. Thus she answered at least 21+1=22 questions correctly on the third section, therefore she may or may not have passed the third section. Not sufficient.

Re: A dental licensure exam requires a 75% minimum score in orde [#permalink]

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09 Oct 2014, 01:12

Expert's post

ApoorvaRed9 wrote:

Bunuel,

How did you get "Thus she answered at least 21+1=22 questions correctly from "Jennifer answered one more question correctly on the third section than she did on the 28-question second section, which she passed"?

Bunuel wrote:

pretzel wrote:

I agree with the explanation for number (2) - maximum correct 28 questions, minimum correct 21 questions.

But I disagree with the explanation for (1). Is it true that whenever there an exam is split into two sections you would have an equal number of questions in each halves? Then again, if the examinee only answered one question correctly in the first half and and nine questions on the second half, he would not have passed the third section.

We are told that Jennifer recorded 8 more correct answers on the second half of the third section than she did on the first half of the third section. So, she recorded 8 more correct answers on the first 15 questions, than she did on the second 15 questions.

A dental licensure exam requires a 75% minimum score in order to pass each section. Did Jennifer pass the 30-question third section?

For Jenifer to pass the section must answer at least 3/4*30 = 22.5, so at least 23 questions correct.

(1) Jennifer recorded 8 more correct answers on the second half of the third section than she did on the first half of the third section.

Even if Jenifer answered all 15 questions correctly on the second half and 15-8=7 questions correctly on the first half, she would only get 15+7=22 questions correctly, which is still less than minimum required (23). Thus, she did not pass the section. Sufficient.

(2) Jennifer answered one more question correctly on the third section than she did on the 28-question second section, which she passed.

For Jenifer to pass the second section must have answered at least 3/4*28=21 questions correctly there. Thus she answered at least 21+1=22 questions correctly on the third section, therefore she may or may not have passed the third section. Not sufficient.

Answer: A.

Hope it's clear.

We are told that she passed 28-question second section, thus she answered at least 0.75*28 = 21 questions on the second section.

We are also told that she answered one more question correctly on the third section than she did on second section, thus she answered at least 21 + 1 = 22 questions on the third section.

A dental licensure exam requires a 75% minimum score in orde [#permalink]

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29 Mar 2015, 11:29

Hi Bunuel,

Regarding option B:

(2) Jennifer answered one more question correctly on the third section than she did on the 28-question second section, which she passed.

When it is clearly mentioned that Jennifer answered one more question correctly, then why we are assuming that AT LEAST 22 questions were answered correctly.

Should it not only be 22 questions (21+1 =22), which will make B sufficient to Ans as No Jennifer did not pass the section.

Re: A dental licensure exam requires a 75% minimum score in orde [#permalink]

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29 Mar 2015, 18:39

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Hi karant,

We don't know EXACTLY how many questions were correctly answered in the 2nd section - we only know that Jennifer 'passed' the section. Since 'passing' is 75% (or higher), we know that (3/4)(28) = 21 questions were correctly answered AT THE MINIMUM.

Thus, Jennifer COULD have answered 21 to 28 (inclusive) of the questions correctly in the 2nd section. By extension, she COULD have answered 22 to 29 of the 30 questions correctly in the 3rd section.

IF she answered 22 questions, then she did NOT pass the 3rd section. IF she answered 29 questions, then she DID pass the 3rd section.

Re: A dental licensure exam requires a 75% minimum score in orde [#permalink]

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22 Aug 2015, 11:35

I thought the half meant half time. Like she solved x questions in first 30 mins and y questions in remaining 30 mins in an hour exam. Is it just me or they should be clear that by half they mean number of questions get split in a section.

goodyear2013 wrote:

A dental licensure exam requires a 75% minimum score in order to pass each section. Did Jennifer pass the 30-question third section?

(1) Jennifer recorded 8 more correct answers on the second half of the third section than she did on the first half of the third section. (2) Jennifer answered one more question correctly on the third section than she did on the 28-question second section, which she passed.

Hi, can anyone explain how this question works, please. I am not fully convinced with the answer.

(1): Fact that if there are only 30 questions total, then there are only 15 questions per half section. That means the MOST she could get right on the second half is 15, and since the second half had 8 more right answers than the first, the most she could have gotten right on the first half is 7 for a total maximum of 22 questions correct. Since she needs 75% to pass, and 22/30 is less than 75% (75% is 3/4 which would be 22.5 out of 30), she cannot pass. Answer is "no” Sufficient

(2): Insufficient. If she passed the second section, that means she answered at least 21 questions correctly, meaning that she answered at least 22 correctly (one more than she did on section two) on section three. But since the magic number is 22.5 to have 75% correct, she may not have passed (22) or she may have passed (22 is the minimum, but she could theoretically have gotten as many as 29 right), Insufficient

Re: A dental licensure exam requires a 75% minimum score in orde [#permalink]

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22 Aug 2015, 15:10

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Hi mandarmali,

The prompt makes NO mention of 'time', so your interpretation is questionable. In real basic terms, you have to work with the information that you're given - the prompt refers to a 'passing score' and the number of questions in the third section (and since 'time frames' were not discussed, we have to assume that 'half of the third section' refers to half of the questions).

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