In a survey, $100$ people were asked about two newspapers. $60$ read paper $X$, $50$ read paper $Y$, $20$…

In a survey, $100$ people were asked about two newspapers. $60$ read paper $X$, $50$ read paper $Y$, $20$ read both. How many read neither?
  1. $10$
  2. $0$
  3. $20$
  4. $30$

Solution

At least one $= 60 + 50 - 20 = 90$. Neither $= 100 - 90 = 10$.

Asked in: MH-SSC-9

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