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ps: Heart problem

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ps: Heart problem [#permalink] New post 16 Oct 2005, 11:47
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Of 50 persons, 20% have heart problem, 8% have both heart problem and heavy blood pressure, how many of them have heart problems but don't have heavy blood pressure?
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Re: ps: Heart problem [#permalink] New post 16 Oct 2005, 14:52
trickygmat wrote:
Of 50 persons, 20% have heart problem, 8% have both heart problem and heavy blood pressure, how many of them have heart problems but don't have heavy blood pressure?


10 people with heart problems
4 People with high blood pressure

10-4=6 (HP,~HBP)
Re: ps: Heart problem   [#permalink] 16 Oct 2005, 14:52
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