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Question

What fraction of the people who were interviewed watched Channel $9$

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Solution

Total people watched TV $= 360 °$
People watched $c h a n n e l$ $9 = 90 °$
$∴$ Fraction of people watched $c h a n n e l$ $9 = \frac{90 °}{360 °} = \frac{1}{4} .$

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