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.
If 5% of people watched DD and CNN. 10% watched DD and BBC, what is the maximum percentage of people who can watch all the three channels?

12.5%

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8.5%

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15%

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Data insufficient

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Solution

The correct option is B 8.5%
Option (b)

Use the maxima of all shortcut
S=117% and X=100%
$\frac{S - X}{n - 1} = \frac{17}{2} = 8.5$

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Similar questions

Q. 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.
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The correct option is B 8.5%Option (b) Use the maxima of all shortcut S=117% and X=100% S−Xn−1=172=8.5

The correct option is B 8.5%
Option (b)

Use the maxima of all shortcut
S=117% and X=100%
$\frac{S - X}{n - 1} = \frac{17}{2} = 8.5$