In a group students ,30 read mathematics,24 read science,22 read english,14 read mathematics only,8 read science only,6 read mathematics and english only,2 read mathematics and science only,8 read none of these subjects.how many students are there in a group?
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here it
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In a survey of 200 students of a school it was found that 120 study Mathematics, 90 study Physics and 70 study Chemistry, 40 study Mathematics and Physics, 30 study Physics and Chemistry, 50 study Chemistry and Mathematics and 20 none of these subjects. The number of student who study all the three subject is
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