How many students are there in all ?
In a group of students ,70 have a personal computer. 120  have a personal stereo ,and 45  have mobile phones.40 have personal computer and personal stereo. 50  have personal stereo and mobile phone . 35 have personal computer and mobile phone . 15 own all the three. How many students are there in all ? 

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Posted on: 20/07/2013

125 Students are there.
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