[From CAT 1997] A survey of 200 people in a community who watched at least one of the three channels

#bprep #cat1997_bprep
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?

This question was asked in CAT 1997 examination.

[palashpatwa]

3:45 pa formula mai 2g nahi aata hai shayad?