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 ?

50%

Marks obtained in Chemistry, Biology and Maths together = 45º + 55º + 80º = 180º

Percentage of marks obtained in Chemistry, Biology and Maths together to toal marks

= \(\frac{180º }{360º }\) × 100

= \(\frac{1 }{2 }\) × 100

= 50%