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Please help me to understand this Q?

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Please help me to understand this Q? [#permalink] New post 27 Jan 2011, 08:24
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A
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D
E

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(N/A)

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57% (01:59) correct 43% (01:06) wrong based on 13 sessions
Can any one help me to understand this Question?
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Re: Please help me to understand this Q? [#permalink] New post 27 Jan 2011, 08:36
Expert's post
SoniaSaini wrote:
Can any one help me to understand this Question?


If we take the attendance of the previous year to be 100 people, then the organizers expected this year 120 people but actual attendance was only 90 people. So actual/expected=90/120=3/4=0.75.

Answer: D.75%.
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Re: Please help me to understand this Q? [#permalink] New post 27 Jan 2011, 08:40
SoniaSaini wrote:
Can any one help me to understand this Question?


In the current year the audience was expected to increase by 20 % more than the the previous year.

let the previous year attendance be 100, so now it is expected to increase to 120% of 100 which is 120

However there was a drop of 10% in people who actually attended , so instead of 120% of (current yearr) 90% of (current year ) came, so basically 90 people came

The question asks us to find how much is 90 as a percentage of 120 which is 75%

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Re: Please help me to understand this Q? [#permalink] New post 27 Jan 2011, 11:43
Sonia ,

When it comes percentage Questions, it always good to assume a 100 as the ''base'' on which you either would decrease or increase and follow according to what is being asked.

When ever a Question of this sorts is asked , assume the ''current'' Number to be 100

Then as explained by the above two post' - a 20% Increase would 20% of 100 + 100 that would be - 120.
But then we had ONLY 90 % attending so that would be 10% of 100 - 100 : 90

90 /120 = 75 %
Best
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Re: Please help me to understand this Q? [#permalink] New post 27 Jan 2011, 21:22
DaVagabond wrote:
Sonia ,

When it comes percentage Questions, it always good to assume a 100 as the ''base'' on which you either would decrease or increase and follow according to what is being asked.

When ever a Question of this sorts is asked , assume the ''current'' Number to be 100

Then as explained by the above two post' - a 20% Increase would 20% of 100 + 100 that would be - 120.
But then we had ONLY 90 % attending so that would be 10% of 100 - 100 : 90

90 /120 = 75 %
Best



Ohh God it was very easy Q and I was unable to understand it.
Thank you very much for helping me.
Re: Please help me to understand this Q?   [#permalink] 27 Jan 2011, 21:22
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