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X percents of the rooms are suits, and Y Percents of the [#permalink]

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01 Sep 2004, 10:01

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D

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23. X percents of the rooms are suits, and Y Percents of the rooms are painted light blue?
Which of the following best represents the least Percentage of the light blue painted suits?

I dont find any of the answer choices to be apt. I dont know if i am missing something or if the questions are of poor quality.
But unfortunately these questions are from real test questions web site and so i am unable to neglect them.
Can anyone explain why one of the answer choices mentioned above is correct.

draw two cirlces, one to represent suites, one to represent light blue. Let the suites that are light blue be n, then suite wiill be x-n and light blue y-n.

So x-n+n+y-n = 100 and you will get x+y-100.

I can't seem to be able to upload a picture, otherwise it will be very clear.

ywilfred,
Aren't you assuming here that the two sets x and y represent the entire sample space (ie they both equal 100 and that there is no other data that represents none of the two ).
It could be possible that there is another entity - z percent of the rooms are painted red.

To make sense this question should assume that x+y>100 to guarantee an overlap between the two groups.
I do not understand how you can have a least number with for instance 10% and 50%, you can then have 0 light blue suits...

23. X percents of the rooms are suits, and Y Percents of the rooms are painted light blue? Which of the following best represents the least Percentage of the light blue painted suits?

I think the Q is poorly framed.
There is a possibility that "the least Percentage of the light blue painted suits" = 0
If we donot assume the above then D is the answer

In fact, the question does imply that there are only three types of rooms, suites, and blue rooms, or blue suites. If there was to be a neither, it would probably say "Z percent are neither"