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At a certain conference, 72% of the attendees registered at least two [#permalink]

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14 May 2011, 22:49

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At a certain conference, 72% of the attendees registered at least two weeks in advance and paid their conference fee in full. If 10% of the attendees who paid their conference fee in full did not register at least two weeks in advance, what percent of conference attendees registered at least two weeks in advance?

Re: At a certain conference, 72% of the attendees registered at least two [#permalink]

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15 May 2011, 01:09

fanatico wrote:

At a certain conference, 72% of the attendees registered at least two weeks in advance and paid their conference fee in full. If 10% of the attendees who paid their conference fee in full did not register at least two weeks in advance, what percent of conference attendees registered at least two weeks in advance? (A) 18.0% (B) 62.0% (C) 79.2% (D) 80.0% (E) 82.0%

Looks like this question is not complete. The required percent cannot be determined with given data. The answer can range from 72% to 92%. Could you please confirm?
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Re: At a certain conference, 72% of the attendees registered at least two [#permalink]

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17 May 2011, 11:39

fluke wrote:

fanatico wrote:

At a certain conference, 72% of the attendees registered at least two weeks in advance and paid their conference fee in full. If 10% of the attendees who paid their conference fee in full did not register at least two weeks in advance, what percent of conference attendees registered at least two weeks in advance? (A) 18.0% (B) 62.0% (C) 79.2% (D) 80.0% (E) 82.0%

Looks like this question is not complete. The required percent cannot be determined with given data. The answer can range from 72% to 92%. Could you please confirm?

Exactly we dont have any bifurcation of people who did not pay the full fee (how many registered in 2 week advance and how many did not)

without knowing that we can't reach the desired answer that how many registered in 2 weeks advance it could be 72% +0% (minimum) to 72% + 20% (maximum)

please clarify
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