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A survey of $200$ people in a community who watched at least one of the three channels – BBC, CNN and DD showed that $80$% of the people watched DD, $22$% watched BBC, and $15$% watched CNN.

Referring to the previous question, how many percents of the people watched all the three channels?

  1. $3.5$%
  2. $0$%
  3. $8.5$%
  4. Cannot be determined
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