Data collected in a survey shows that 50% of the buyers are interested in buying a particular brand of toothpaste. The central angle of the part of the pie chart representing this information is:
A
145∘
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B
40∘
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C
128∘
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D
180∘
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Solution
The correct option is D180∘ Data collected in a survey = 50% Therefore, 50100×360∘=12×360∘=180∘ The central angle of the sector of the pie chart representing this information is 180∘.