1.

In a city there are three major news papers, A, B, C of which atleast two are read by 35% of population. It is known that newspaper C is read by 45% of the population andthe newspapers A and B are read by 15% and that all the three are read by 10%. Whatpercent of population read only newspaper C ?​

Answer»

-STEP explanation:Those who READ all the three news papers = 10%Those who read newspapers A and B = 15%Those who read newspapers C = 45%Those who read newspapers C only = ?Those who read at least two news papers = 35%=> 5% + x + 10% + y = 35%=> x + y = 35% - 15%=> x + y = 20% → EQUATION 1Those who read newspapers C = 45%=> x + 10 + y + z = 45%=> x + y + z = 45% - 10%=> x + y + z = 35%=> 20% + z = 35% [ :. from eqn 1 ]=> z = 35% - 20%=> z = 15%:. Those who read news paper C only = 15%



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