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The given pie chart shows the marks obtained in an examination by a student (in degrees). Observe the pie chart and answer the question that follows.
If total marks are 720, then the marks obtained in Chemistry, Biology and Maths together is what percentage of the total marks ?
Given, total marks = 720
Marks obtained in Chemistry, Biology and Maths together = $$\frac{45^{\circ\ }+55^{\circ\ }+80^{\circ\ }}{360^{\circ\ }}\times720$$ = $$\frac{180^{\circ\ }}{360^{\circ\ }}\times720$$ = 360
$$\therefore\ $$Required percentage = $$\frac{360}{720}\times100$$ = 50%
Hence, the correct answer is Option A
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