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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.
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...