Puzzled PRiNCE Posted May 16, 2014 Report Share Posted May 16, 2014 Two surveys were published by two separate marketing organisations on consumption of tea and coffee in Drinkville. The first organisation interviewed 100 people and the results showed that 78 of them drink coffee 71 of them drink tea 48 of them drink both coffee and tea. The second organisation interviewed 115 people and the results showed that 91 of them drink coffee 82 of them drink tea 58 of them drink both coffee and tea Which of these two results are not correct? Justify your answer Quote Link to comment Share on other sites More sharing options...
0 bonanova Posted May 17, 2014 Report Share Posted May 17, 2014 Survey 1. It lists at least 101 people: 78 drink coffee and 23 don't; 71 drink tea and 30 don't. Quote Link to comment Share on other sites More sharing options...
0 dgreening Posted May 21, 2014 Report Share Posted May 21, 2014 I agree with bonanova Quote Link to comment Share on other sites More sharing options...
0 bonanova Posted May 22, 2014 Report Share Posted May 22, 2014 Ya think maybe we just did someone's homework problem? Quote Link to comment Share on other sites More sharing options...
0 BMAD Posted May 22, 2014 Report Share Posted May 22, 2014 (edited) Survey 1. It lists at least 101 people: 78 drink coffee and 23 don't; 71 drink tea and 30 don't. ....never mind Edited May 22, 2014 by BMAD Quote Link to comment Share on other sites More sharing options...
Question
Puzzled PRiNCE
Two surveys were published by two separate marketing organisations on consumption of tea and coffee in Drinkville.
The first organisation interviewed 100 people and the results showed that
78 of them drink coffee
71 of them drink tea
48 of them drink both coffee and tea.
The second organisation interviewed 115 people and the results showed that
91 of them drink coffee
82 of them drink tea
58 of them drink both coffee and tea
Which of these two results are not correct? Justify your answer
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