The figure below shows a circle divided into 3 equal parts. The shaded region corresponds to 23rd of the circle. If the unshaded region corresponds to a3rd of the circle. Then, the value of a is
Since the entire circle is divided into 3 equal parts, each part represents 13rd of the circle. Since there are two shaded parts, the shaded region corresponds to 23rd of the circle. There is only one part which is unshaded and hence this corresponds to 13rd of the circle.
Therefore a = 1.