In the city,50% people read newspaper A,45% read newspaper B, and 25% read neither A nor B. What percentage of people read both the newspaper A as well as B

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Solution

People reading newspaper A =50%

People reading newspaper B =45%

people reading neither A nor B =25%

people reading either A or B =100-25
=75%

thus
people reading newspaper A + people reading newspaper B - people reading newspaper both A and B = 75%

50%+45%-people reading both A and B =75%

people reading both A and B = 95-75 %
=20%

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