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.What is the maximum percentage of people who can watch all the three channels?1. 12.5%2. 15%3. 8.5%4. Data insufficient5. None of these

1) 1
2) 2
3) 3
4) 4
5) 5

• 80%of200 = 160(DD) 22%of200=44(BBC) 15%of200=30(CNN).........total is 234 but sample space is 200....... ..it means minimum 34 can watch all channels and maximum would be 30 who watch all channels ..............hence 30/200=x/100=> 15%.(ans).....
• 9 years agoHelpfull: Yes(0) No(1)