Which is the closest probablities

Question

Answer 1

First find the total area. Then find the area of the shaded area. Then divide the shaded area by the total area.

Answer 2

1. Compute the area of the square (side length = 40 cm)
2. Compute the area of the largest circle (diameter = 40 cm)
3. The area of the shaded region = area of the square - area of the circle.
4. P(dart lands in shaded area) = (Area of Shaded Region) / (Area of Square) x 100%