In a survey of town of Wasco, it was found that 65% of the people surveyed watched the news on television, 40% read newspaper, and 25% read a newspaper and watched the news on television. What percent of the people surveyed neither watched the news on the television or read a newspaper?

20%

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sree_mech

  • Jun 17th, 2006
 

Let the pop be 100%, 40%  read paper, 65% watched tv and 25% did both.

so, p(a union B)= p(a)+p(b)-p(a and b)  => 65+40-25 => 105-25 = 80

total pop- those who do either of these = 100 -80 = 20% ANS

 

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