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Question

In a survey of some students, it was found that 60% of the students were studying commerce and 40% were studying science. If 40 students were studying both the subjects and 10% did not study any of two subjects, by drawing a Venn diagram, find :
i)
the total number of students
ii) the number of students who were studying science only

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    Solution


    Let total number of students be x
    i) 0.6x+0.4x40+0.1x=x
    x=400
    ii) Students studying science only =0.4x40
    =0.4×40040
    =16040
    =120


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