1.

One hundred management students who read at least one of the three business magazines are surveyed to study the relationship pattern. its found that 80 read Business India, 50 read Business World and 30 read Business Today. Five students read all the three magazines. How many read exactly two magazines?

Answer» `=75-x-y+x+y+5`
`=45-x-z+25-y-z`
`=150-x-y-z=100`
`=x+y+z=50`.


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