Question : Study the given table and answer the question that follows. The table shows the number of people who responded to a survey about their favourite style of music.
What percentage of the total sample indicated that Rock is their favourite style of music (rounded off to 2 decimal places)?
Option 1: 27.36%
Option 2: 18.25%
Option 3: 29.65%
Option 4: 22.35%
Correct Answer: 27.36%
Solution : Number of people who like rock = 9 + 7 +13 = 29 Total samples = 28 + 32 + 46 = 106 Required percentage = $\frac{\text{People who likes rock}}{\text{Total samples}}\times100$ = $\frac{29}{106}\times100$ = 27.358 = 27.36 (rounded off to 2 decimal places) Hence, the correct answer is 27.36.
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