Question: Choose 1 ; if the question can be answered by using one of the statements alone, but cannot be answered using the other statement alone.
Choose 2 ; if the question can be answered by using either statement alone.
Choose 3 ; if the question can be answered by using both statements together, but cannot be answered using either statement alone.
Choose 4 ; if the question cannot be answered even by using both statements together.
A square is inscribed in a circle. What is the difference between the area of the circle and that of the square?
The diameter of the circle is 25 cm.
The side of the square is 25 cm.
∴ Area of the square can be computed and thus the required difference.
∴ Statement A alone is sufficient to answer the question.
∴ Area of the circle can be computed and thus the required difference.
∴ Statement B alone is also sufficient to answer the question.
∴ We can answer the question using either statement alone.
Hence, option (b).